PHOTOS: Kelly Osbourne Tweets Her Sexy New Look

Kelly Osbourne Tweeted pictures of her svelte figure prior to performing with the Pussycat Dolls at Los Angeles' famed Viper Room Wednesday night, RadarOnline.com has learned, and there’s little doubt the 25-year-old reality star has ever looked better.

Osbourne performed at the exclusive affair with Carmen Electra and Mya, who she ironically competed against during last spring's edition of Dancing With The Stars (Electra had been a participant a year earlier).

Kelly made sure to differentiate between her Pussycat Dolls set and what viewers saw her do on Dancing With The Stars, writing in Closer magazine, "This isn’t stiff ballroom - it’s slinky and sexy!"

Following the show, she Tweeted to Pussycat Dolls founder Robin Antin: "i cant thank you enough for tonight i had so much fun! i f******* love you robin!!!!!!!!"