What an eyeful! Mariah Carey puts on a VERY busty display in a plunging strappy black dress as she steps out ahead of Cardiff gig

She's almost as famous for her figure-flaunting outfits as she is her stunning vocals.

And Mariah Carey stayed true to her racy sense of style as she rocked an extremely plunging black gown while stepping out in London on Monday.

The Hero hitmaker, 45, practically spilled out of her sizzling skintight dress as she left the hotel to meet her adoring fans ahead of her gig in Cardiff.

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Simply sizzling: Mariah Carey, 45, stunned as she stepped out in a sizzling skintight dress with a plunging neckline in London on Monday

The We Belong Together crooner showed off her famous curves to perfection in the bandage-style gown which hugged every contour of her toned figure.

Featuring criss-cross detail along the neckline, the garment drew the eye tantalizingly to the blonde beauty's ample assets.

The Grammy winner accessorized with a simple flash of ivory in the form of a pearl necklace and shaded her peepers with some oval-framed sunglasses.

She lent some rocker edge to the ultra-glamorous ensemble with a Gucci leather jacket that featured heavy duty details like multiple zips and studded lapels.

Pop diva: The We Belong Together crooner showed off her famous curves to perfection with the bandage-style gown which hugged her toned figure

Monochrome maven: The diva accessorized with a simple flash of ivory in the form of a pearl necklace and shaded her peepers with some oval-framed sunglasses

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Mariah Carey is diva-licious all day everyday. Whether she's on the stage or just walking out in London, she's making head turn in her glamorous everyday gown.

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All-smiles: The beaming diva was mobbed by adoring fans, one of whom even gave her a bouquet of flowers

Her 35-carat engagement ring from her billionaire fiance James Packer, which is estimated to cost a whopping $7.5million, was on full display on her perfectly manicured hands. 

Mariah kept her sleek caramel-hued tresses in a long poker-straight style that fell past her shoulders and opted for a flattering side-parting.

Despite shielding much of her face with her shades, the mother-of-two highlighted her cheekbones with a sweep of tawny bronzer and emphasized her plump pout with a pale pink gloss, 

Bling bling! Mariah's 35 carat engagement ring from her billionaire fiance James Packer, which is estimated to cost a whopping $7.5million, was on full display on her perfectly manicured hands

Vision of Love: The talented volcalis kept her sleek caramel-hued tresses in a long poker-straight style that fell past her shoulders and opted for a flattering side-parting

Revealing: The We Belong Together crooner showed off her famous curves to perfection with the bandage-style gown which hugged her toned figure

Although she was mobbed by many an adoring onlooker, the diva looked unruffled and beamed for the cameras as she signed autographs and even accepted a bouquet of flowers from one fan. 

Mariah is currently in the UK as part of her Sweet Sweet Fantasy Tour, which kick-started on March 15 in Glasgow and spans Oslo, Munich and Milan - ending in Johannesburg on May 2.

The All I Want For Christmas hitmaker looked ready to hit the stage and show off her vocal gymnastics in Cardiff's Motorpoint Arena on Monday, which was the next stop on her tour. 

Diva coming through! Mariah stepped out in London ahead of her gig in Cardiff's Motorpoint Arena as part of her Sweet Sweet Fantasy Tour 

She will be wrapping up her UK visit at London's O2 Arena on Wednesday night - and it seemed like the talented vocalist didn't want the trip to end, as she took to Twitter earlier in the day to gush about the upcoming performance.

The singer - who shares four-year-old twins Moroccan and Monroe with former husband Nick Cannon - told her 15.8million followers: 'Can't wait to see my Lambs! This week #sweetsweetfantasytour!'

And just a day earlier on Sunday she posted: '#Cardiff! See you tomorrow!! #UK' with many a kissing face emoji. 

Mariah's tranquil mood couldn't be said the same for her die-hard fans who were left waiting for 45 minutes at Thursday's Leeds gig at the First Direct Arena. 

Beaming: The singer appeared in high spirits, despite facing criticism for ariving 45 minutes late to last Thursday's Leeds gig at the First Direct Arena

Hero: The hitmaker is currently in the UK as part of her Sweet Sweet Fantasy Tour, which kickstarted on March 15 in Glasgow and spans Oslo, Munich and Milan - ending in Johannesburg on May 2

The singer was supposedly due to arrive on stage at 20.45, but arrived at 21.30, causing disheartened fans to take to social media to vent their frustrations.

One user posted: 'Excuse me Mariah Carey, but there are 10,000 people in Leeds waiting for you. Care to join us? #late'.  

Another added to the mix by saying: 'Absolute joke how [she] was 40 min late in Leeds tonight :( Saw a grand total of 40 mins of the show.'

There were however some loyal fans who jumped to Mariah's defence with one user stating: 'Who's complaining that Mariah is late? Hush. Mariah transcends time, dahhhling, you can't hold her to regular standards.'

Another successful show: Mariah was all smiles as she made her way back to The Corinthia Hotel after her gig in Cardiff

Beaming: The singer sported the same ensemble as she had earlier in the day

Their favourite: The singer kindly posed for pictures as she made her way to the car

Ta-rah darlings: The singer's locks were styled into light waves