Kelly Osbourne has worked very hard over the last year with a combination of working out and dieting to shed a few extra pounds.

The 25-year-old flaunted her new figure last night onstage as she performed with The Pussycat Dolls at Los Angeles’ famous Viper Room.

She took to the stage alongside the burlesque troupe, actress Carmen Electra and singer Mya, the Daily Mail reported.

“‘I’m doing a song called 13 Men as well as Big Spender,” Osbourne told fans in her Closer magazine column before her performance.

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

Though her performance was invite-only, celebs like Kim Kardashian, Eva Longoria and mom Sharon Osbourne reportedly attended the soiree.

Kardashian even took to Twitter to support Osbourne, writing, “[Kelly] just killed it!!! She sang and danced and looks amazing!!!!! Love these costumes!”

Source

UPDATE: She posted this picture on her Twitter…

Well I hope the song is as good as that title!

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Pussycat Dolls have just premiered the video for their version of A R Rahman’s Oscar winning “Jai Ho!” “It was such a great honor to be able to re-write my own version of the lyrics,” said PCD’s Nicole Scherzinger who worked with producer Ron Fair on the new interpretation of the track. The Dolls shot the video for “Jai Ho (You Are My Destiny)” at an abandoned train station museum in snowy Vienna with director Thomas Kloss (Britney Spears, Miley Cyrus).

What did you think?

The Pussycat Dolls showed up to perform at Donny Duetsch’s 50th birthday party in NYC this weekend. What a show that must’ve been!

MORE PICS after the jump! (more…)