View the Gallery / 25 Photos »

So guess who joined the Pussycat Dolls last night in the LA Viper Room? That’s right, Kelly Osbourne! And the bitch looked amazing.

The 25-year-old star wore a tight silver backless dress, fishnets tights and a red sparkly hat as she left the show which put her on stage with the rest of the troupe, Carmen Electra and Mya!

Earlier, Kelly had arrived at the venue wearing a sexy outfit of a sparkly bra, black PVC corset, fishnets, tiny hotpants and silver shoes. She performed two songs, including the classic “Big Spender” and just before the show she posted a picture of herself wearing just a bra and panties, with a cigarette placed seductively between her lips.

Kim Kardashian, Eva Longoria and Sharon Osbourne were all in the audience and said the show was amazing

Kelly has said that appearing on Dancing With The Stars really is what changed her mindset about diet and exercise. Well, all I can say is damn…you look good! Check out the rest of the photos that also include PD founder Robin Antin and actress Malin Akerman!