Kelly Osbourne has never looked so good and she’s perhaps the first to admit to it. Slimmer and more confident, the star put in an appearance with the legendary burlesque troupe the Pussycat Dolls.

As fans must know, PCD acts are no strangers of celebrity appearances, including acts featuring huge names from Christina Aguilera to Paris Hilton.

Because Kelly has always been heavier, she probably never even dreamed of one day dancing with the PCD – but she’s no longer that, therefore she actually got to do that, the Daily Mail says.

And it was for a star-packed audience that Kelly performed too. Aside from PCD founder Robin Antin, other members of the audience included R&B singer Mya, glamour girl Carmen Electra, socialite Kim Kardashian and actress Eva Longoria.

“The 25-year-old star wore a tight silver backless dress, fishnets tights and a red sparkly hat as she left Los Angeles’ Viper Room after performing with the Pussycat Dolls last night,” the Mail writes.

“Kelly, who lost three stone after appearing on Dancing With The Stars, took to the stage alongside the burlesque troupe, actress Carmen Electra and singer Mya in the invite-only show,” the publication adds.

Before and after the show, Kelly took care that her fans who couldn’t get an invite knew everything that went on inside, tweeting pictures of herself and writing about her appearance in her Closer column.

“It’s going to be me, Carmen Electra, Mya and some of the other Dolls singing and dancing. I’m doing a song called 13 Men as well as Big Spender,” Kelly wrote before the show.

“It’s the first time I’ve really danced since filming Dancing with the Stars, but it’s so different. This isn’t stiff ballroom – it’s slinky and [hot]!” the star added.

Judging by how Kim Kardashian reacted on Twitter after the show, Kelly put on quite a memorable performance.

“OMG @MissKellyO just killed it!!! She sang and danced and looks amazing!!!!! Love these costumes!” the reality star gushed on her Twitter page even before leaving the venue.