Selena Gomez was 'boozing it up and stumbling' at Vanity Fair Oscar party... just weeks after leaving rehab for exhaustion

By Heidi Parker

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Selena Gomez looked to be in good spirits while arriving at the Vanity Fair Oscar party on Sunday.

But according to a RadarOnline source, once inside the event the 21-year-old had a little too much fun.

On Monday the site reported the 21-year-old was 'boozing it up and stumbling' out of the event. This comes just weeks after the Wizards Of Waverly Place actress left a rehab center for exhaustion.

Selena's rep did not returns calls to MailOnline.

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She is 21 after all: Selena Gomez had one too many drinks at Sunday's Vanity Fair Oscar party, according to a RadarOnline source

She is 21 after all: Selena Gomez had one too many drinks at Sunday's Vanity Fair Oscar party, according to a RadarOnline source

Radar went into detail about Gomez's night of partying, pointing out she was sipping on champagne and perhaps something stronger.

The star was never photographed with a drink in her hand, however, and a source told MailOnline, 'She wasn't even there very long.'

'Selena was drinking constantly throughout the entire party when I saw her,' the eyewitness insisted to Radar.

Girls just wanna have fun: The former Disney star was playful with longtime pal Vanessa Hudgens inside the exclusive event

Girls just wanna have fun: The former Disney star was playful with longtime pal Vanessa Hudgens inside the exclusive event

Not hungover: The Slow Down singer heading to a dance studio the morning after the fete

Not hungover: The Slow Down singer heading to a dance studio the morning after the fete

'She was having a grand old time and towards the tail end she was stumbling in her heels and almost toppled right over!' the source added.

The beauty shared a fun photo with friend Vanessa Hudgens in an Instagram snap.

It was captioned, 'My only, official party buddy for life ;)'

'Selena and Vanessa were just having a really good time, laughing and taking pics,' the source said.

'She wasn’t slurring too bad, but was definitely in the happy-sleepy stage.'

In January the Love You Like A Love Song singer spent two weeks in an Arizona rehab facility.

In February her rep told Radar, 'Selena voluntarily spent time at Meadows but not for substance abuse.'

The day after the party, Gomez looked just fine - as in she didn't have a hangover - as she headed to a dance studio in LA.

In addition to being accused of letting her hair down for the night, Gomez was singled out by ex-boyfriend Justin Bieber for her stunning Oscar style.

'Most elegant princess in the world,' he captioned a set of photos of Selena in a gold gown.

The Shake It Up singer did stand out on the carpet for her plunging neckline gown that was sheer toward the bottom.

Long wavy hair and black cat eyes added to the glamorous look.

Not over her?: On Monday Justin Bieber called his ex-girlfriend Selena Gomez the 'most elegant princess in the world' and posted two photos from her Oscar night appearance

Not over her?: On Monday Justin Bieber called his ex-girlfriend Gomez the 'most elegant princess in the world' and posted two photos from her Oscar night appearance

Praying for a reconciliation: The Baby singer, seen here in December, has been off and on with the actress for years

Praying for a reconciliation: The Baby singer, seen here in December, has been off and on with the actress for years

The gushy note comes as a bit of a surprise after the couple reportedly had a bad falling out earlier this year.

They were last seen together in January riding Segways. The two had also posted an Instagram photo where they were in an embrace at about the same time.

Bieber did not attend the Oscars and it's believed he was in Atlanta, Georgia on Sunday evening. The star has been residing in that city for the past several weeks, and even spent his 20th birthday there on Saturday.

She sure is loved: Getting photo bombed by acting legend Bill Murray

She sure is loved: Getting photo bombed by acting legend Bill Murray

  

Justin has been hanging out with several scantily clad women since he ended it with Selena for good.

On the evening of his Miami arrest, he was spotted with model Chantel Jeffries.

The exotic looker was also seen exiting the artist's Miami rental, and days later she was seen with him on the beach in Panama.

The former You Tube sensation has been in the company of strippers as well. He was seen at a Texas strip club making it 'rain' on the dancers with $75,000 worth of one dollar bills.

In January Gomez - who looked happy next to Bill Murray at the Oscar bash - had complained to the March issue of Seventeen magazine that she had an ugly split with the Beauty And A Beat singer.

'This year is when I really started feeling powerful,' the looker started.

'I had always been the underdog secretly. I was on Disney when it was Miley [Cyrus], the Jonas Brothers, and Demi [Lovato]. I questioned the way I looked, acted, sang, and wrote.'

She then let it drop that she had a nasty split with Justin - who was arrested for a DUI in Florida in February.

The met at such a young age: In November 2011 the couple looked in love at an awards show

The met at such a young age: In November 2011 the couple looked in love at an awards show

Last date: Gomez and Bieber were seen riding Segways in January in LA

Last date: Gomez and Bieber were seen riding Segways in January in LA

'Then I turned 20, went through a really bad breakup, and realized I needed to have Come & Get It be amazing. I wanted it all to be me.

'I'm glad it's taken me this long to get where I am because now I am ready for it.'

The Love You Like a Love Song crooner has been linked to singer Austin Mahone, but has said she's single.

They had so much love: An Instagram shot of the two singers in January which Bieber captioned, 'Love the way you look at me'

They had so much love: An Instagram shot of the two singers in January which Bieber captioned, 'Love the way you look at me'

The comments below have been moderated in advance.

I'm not going to post the same thing I've been posting here for over a year, because no one wanted to believe it, and kept getting angry with me. So, I'll just say, she went to rehab because of her breakup with Bieber. That's what everyone seems ok with hearing. Not that its helping her, in any way...

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Classy girl!

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Why is it that people think that celebrities should not act like normal people? A lot of young people go out a get a bit drunk. Where's the story here?

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Oh c'mon. She was over-served at the Oscars. They all were! Can't wait to see her perform on Sunday at the Houston Livestock Show and Rodeo.

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Rehab centers used to mean a place where alcoholics' and drug addicts broke their habits- now it just implies a week or two or more likely a weekend in a dry out tank.

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She's 21!! If you could have seen me out at 21...!

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the look on bill murry's face.... that's a flat butt selena!

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Selena and her girlfriend are absolute beauties. Many women who have let themselves go are sure to negatively lambast them for doing nothing more than having a good time.

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selena gomez drinking again omg

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God forbid a 21 year old going to a party and having a few drinks....

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