By Laura Schreffler

The comeback queen: Perry returned to work earlier this month to play a string of shows in Asia

She may be in the midst of a divorce, but Katy Perry is clearly deciding to get on with her life.

The 27-year-old singer made her first public appearance since Russell Brand filed for divorce on December 30.

Blue-haired Katy turned up in Las Vegas last night to support her jewellery designer friend Markus Molinari at a charity event.

The pop star looked stunning as she posed for pictures with her pal at The Mirage Hotel's new 1oak nightclub in Sin City.

She wore an snug embellished mini-dress and sexy, sky-high stiletto sandals.

The outfit was fairly mundane compared to her usual ensembles, but her Smurf-blue hair added more than enough colour to balance out the rest of her look.

However, she didn't add any extra accoutrements to her outfit aside from a small, simple pair of earrings.

Even fellow guest Paris Hilton noticed how lovely the singer looked, and commented on it via Twitter.

Support system: The 27-year-old singer held hands with best friend Markus Molinari on the red carpet

Happy go lucky: Katy Perry made her first public appearance since splitting from Russell Brand last night in Las Vegas

The heiress wrote: 'Katy Perry looking gorgeous across the room. Love her hair & dress! Stunning!'

Her happy smile was the only accessory necessary at the fundraising event for actress Patricia Arquette's charity website,

Katy seemed keen to show the world that she's ready to move on from her 14-month marriage.

She even tweeted from the event: 'Happy to be supporting my best friend @MDMOLINARI & his j.molinari jewelry w/all my other besties in #VEGAS for a great cause @GiveLoveOrg'.

Having a close friend on hand was all the support Katy needed and she and Molinari strolled hand in hand down the red carpet.

Put on a happy face: The blue-haired singer was also on hand to support protege Ferras at Sin City's 1oak club

All for giving: The One That Got Away singer posed with Patricia and David Arquette at the charity event

He later told People magazine that Katy was doing 'amazing' and that she was in town because 'that's what friends do.'

During the event, she hung out in the VIP booth and watched her protégé, Ferras, perform while having a few low-key drinks with her friends.

Perry's happy face and bold public appearance is a surprise, given that new reports have surfaced that her estranged husband has already moved on.

All that glitters: Paris Hilton shone in a black and silver sparkling number at the event

The 36-year-old comedian has also moved in to a West Hollywood bachelor pad.

He has also allegedly returned to his former womanising ways - according to Us Weekly, who allege he has moved on with one woman in particular.

The source claims that the comedian has ‘sought out one particular woman to explore a relationship with.'

'[Russell] told her he wanted her to move in with him after the divorce is final.’ an insider told the magazine.

Charitable souls: Shenae Grimes and Christina Milian also attended the event

Couple in love: David Arquette supported his sister's charity by turning up with girlfriend Christina McLarty

While his ex was in Las Vegas yesterday, he was seen out and about having lunch to West Hollywood's Red Rock bar wearing a sombre all-black ensemble.

Last month, the Arthur actor released a statement ending their marriage.

He said: 'Sadly, Katy and I are ending our marriage. I'll always adore her and I know we'll remain friends.'

His legal team filed court documents at the Superior Court in Los Angeles citing 'irreconcilable differences.'

What the ex got up to: Russell Brand was spotted wearing all black having lunch in West Hollywood yesterday

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