Awkward! Taylor Swift joins ex John Mayer and nemesis Katy Perry at Drake's A-list 30th birthday 

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She famously wrote revenge songs about ex-boyfriend John Mayer and ex-friend Katy Perry.

But perhaps Taylor Swift has moved on from the drama, as she seemed nonplussed to join both of them at Drake's 30th birthday bash in West Hollywood on Sunday.

The 26-year-old looked to be in good spirits as she flashed her enviable figure in a midriff-baring top and skintight skirt as she mingled at the star-studded event, despite their awkward history.

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It was bound to happen eventually: Ex-friends Taylor Swift and Katy Perry were spotted taking pictures with the same guests at Drake's 30th birthday bash on Sunday in West Hollywood, though of course, not together

That's not all! John Mayer, who dated both Taylor and Katy, was also seen heading into the star-studded bash 

Taylor flashed some skin in a tiny, black bandeau top that put her toned stomach on display, coupling it with a daring, black leather skirt with a thigh-high slit.

She wore a black jacket slung over her shoulders, and wore her shoulder-length, blonde tresses styled in soft curls.

She uncharacteristically opted out of her signature red lipstick, instead choosing a bold, smoky eye and nude lip.

The Bad Blood singer carried a jewel-shaped, metallic clutch, and was joined by squad members Karlie Kloss and the Haim sisters as she arrived at the nightclub. 

Making an entrance: The blonde beauty was flanked by her squad as she arrived on Sunday

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She's forever on our fashion radar with her impeccable style sense and as Taylor Swift headed to Drake's birthday bash here she yet again didn't put a foot wrong.

In a leather wrap asymmetric skirt paired with a bandeau crop top, Taylor showed off her seriously toned abs. She paired the look with a black duster coat and a pair of studded sandals which finished the look off in serious style.

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She's golden! Taylor accessorized with flash tattoos for the birthday bash

Karlie showed off her toned pins in a black and white patterned mini dress with a short-sleeved top. 

She finished off the look with black boots, and wore her blonde tresses in a center part, and styled straight.

Meanwhile, the Haim sisters looked to be coordinating in slinky, red dresses of varying lengths.  

Going hell for leather! The pop princess put her toned pins on display in a figure-hugging, black leather skirt with a thigh-high slit

Can't hide her smile! Taylor flashed a wide grin as she arrived to the party looking flawless

Ready for anything: The Blank Space singer smiled as she chatted with her squad

Known nemesis Katy wore a sleeveless, semi-sheer black dress with metallic embellishments, accessorizing with a shimmery, silver choker necklace.

She wore her long raven tresses in a center part, and styled straight, and notably did choose a bright, red lipstick for the evening.

The pair were spotted posing for photographs with the same crowd, though never wound up in the same shot. 

They've got her back! Taylor was joined by squad members Karlie Kloss and Haim 

Natural beauty: Karlie kept her make-up simple and wore her blonde locks in a center part and styled straight

Adding an edge: Alana Haim accessorized her red dress with a stylish, black leather jacket

Taylor's hit 1989 single Bad Blood was famously inspired by her rivalry with the Rise singer.

Of the inspiration for the song, she had told Rolling Stone: 'For years, I was never sure if we were friends or not. She would come up to me at awards shows and say something and walk away, and I would think, 'Are we friends, or did she just give me the harshest insult of my life?'

However it all came to a head in 2013, with Taylor adding: '[Then last year] she did something so horrible. I was like, 'Oh, we're just straight-up enemies.'' 

Coordinating: The Haim sisters appeared to be sporting coordinating, slinky red dresses in varying lengths

 Turning heads: The awkward situation was not the only reason Taylor turned heads, as she stunned in a tiny, black bandeau top and skintight, black leather skirt

What tension? Taylor looked to be having a great time at the party, despite being stuck in a room with an ex-boyfriend and an ex-friend

Notable lines include: 'Did you have to ruin what was shining now it's all rusted,' and ''Cause baby now we got bad blood/ You know it used to be mad love/ So take a look what you've done/ 'Cause baby now we got bad blood.'

Katy has responded to Taylor's jab multiple times on Twitter, first posting: 'Watch out for the Regina George in sheep's clothing...' after the star's Rolling Stone interview.

She later tweeted, amid Taylor's 2015 feud with Nicki Minaj: 'Finding it ironic to parade the pit women against other women argument about as one unmeasurably capitalizes on the take down of a woman...' 

Seeing red: Katy showed off a bright red lipstick - usually Taylor's signature look - and accessorized her slinky, black dress with a shimmery, silver choker necklace

Unfazed: Katy didn't seem bothered either by the presence of her ex and music rival

Peace! The Rise singer playfully posed for photographs while at the star-studded bash, throwing up the peace sign

Katy also recently responded to a fan question, asking if she would ever collaborate with the pop princess, noting: 'if she says sorry, sure!' 

Meanwhile, John - who has dated both Taylor and Katy - almost seemed uneasy as he headed into the West Hollywood hot spot in a fitted, black suit. 

And John inspired quite the memorable tune as well, Dear John, after dating Taylor back in 2009, when she was still just a teenager. 

Having fun with it: Katy pulled a shocked face in a video captioned: 'Chillin like a villain'

Feeling uncomfortable? John posed for photographs as well, but seemed a bit less enthused than his two exes

Dapper: Drake put his best foot forward in a stylish, green suit jacket as he arrived for his party on Sunday

A few of the most unforgettable lyrics include: 'Don't you think I was too young/ To be messed with/ The girl in the dress/ Cried the whole way home/ I should've known.'

And John didn't take the dig lying down, later telling Rolling Stone that 'it was a really lousy thing for her to do.'

He added: 'Because I didn't deserve it. I'm pretty good at taking accountability now, and I never did anything to deserve that.'

Dressed to the nines: The Views artist sported gold accessories and finished off the look with black dress shoes

Polite: Drake shook the security guard's hand as he arrived

Birthday boy: Drake was joined by a host of celebrities to celebrate his 30th birthday at Delilah in West Hollywood 

To make things even more awkward, John was seen just the night before getting cozy with Demi Lovato at another West Hollywood hot spot, Catch LA. 

They had reportedly arrived and left separately, but kept pretty close while inside the venue, with an insider saying: 'John had his arm around Demi and was whispering sweet nothings into her ear.'

'She was into it. They weren't making out or anything but she was giggling the whole time,' they added, with another source saying that John was telling Demi that she has 'one of the greatest voices.'

Grateful: One of the guests captured Drake giving a heartfelt speech as he thanked everyone for supporting him 

Cheers! Drake took the microphone as he stood by a three-tiered cake and scantily clad women to say: 'It really, it really means a lot to me, everybody being here, and the support that you give, you know, night in and night out...'

A lot to celebrate! Drake's three-tiered cake featured images from his newly announced project More Life, Happy Birthday messages, and photos of him as a child

On Saturday Drake put his best foot forward in a stylish, green suit jacket worn with a black turtleneck an gold accessories.

He finished off the look with a fitted pair of black trousers as well as coordinating, black dress shoes.  

At Sunday's bash, the birthday boy himself gave a bit of a toast to thank everyone for their support, which one of the guests later shared on Instagram.

Suave: Jamie Foxx was stylish in a fitted, black suit which he accessorized with a purple tie

In good company: The Oscar winner stopped for a photo with rapper French Montana before heading into the party 

Happy to be here! French laughed as he chatted before heading inside

Drake held the microphone as he stood by a three-tiered birthday cake and two girls dressed in revealing, Twenties costumes.

'It really, it really means a lot to me, everybody being here, and the support that you give, you know, night in and night out...' the Too Good hitmaker shared.

Drake's three-tiered cake featured black and white decorations as well as a large number thirty on the top, with each layer celebrating the star in a different way.

Eye-catching: The rapper, and Khloe Kardashian's ex, stood out in an all-white ensemble with bejeweled accessories

Taking it easy: French looked to be enjoying himself at Drake's 30th bash

Lady in red: Zoë Kravitz bundled up in a black jacket with red lining, accessorizing the look with a complementary pair of strappy, peep toe red heels

The first tier featured images from Drake's newly announced upcoming project More Life, which he posted will be dropping in December.

The second was decorated with the star's name as well as 'Happy Birthday,' and the bottom tier featured adorable photographs of the Grammy winner as a child.

Also spotted at the star-studded party was Jamie Foxx, who looked suave in a fitted, black suit with a purple tie.

He stopped to take a photo with rapper French Montana before heading into the party. 

Heading out: A man in a fitted, black suit led the way as a platinum blonde Zoë left the party

Taking the plunge! Shay Mitchell flashed some skin in an eye-catching, gold suit jacket with nothing underneath

Bold: The Pretty Little Liars star coupled her gold suit with black pumps, and showed off a smoky eye

French was decked out in all white for the bash, accessorizing with a collection of chains as well as a bejeweled wristwatch and a statement ring. 

Zoë Kravitz and Pretty Little Liars star Shay Mitchell were also among the A-list guests at Drake's party, each accompanied by a man in a well-tailored suit.

Zoë bundled up in a black jacket with red lining, coordinating the look with strappy, peep toe red heels. 

Calling it a night! Katy was later spotted sitting in the back seat as she got a lift home after the party

Quite a night! The performer departed the star-studded soiree at around 4am

Close call! Katy's ex John was seen leaving around the same time

She showed off platinum blonde tresses in braids, as well as a pink lipstick and shimmery eye shadow.

Shay turned heads in a gold suit, sporting a plunging jacket with nothing on underneath.

She coupled it with a coordinating pair of loose-fitting trousers, and showed off a bold, smoky eye. 

Making moves: French also emerged from the West Hollywood club in the early hours of the morning

A good night: French looked to be in good spirits as he left, laughing as he headed to his car

Katy, John, and French were later spotted heading to their waiting cars as they left the bash, around 4am. 

French looked to be in good spirits as he left, smiling and laughing as he made his way to his car.