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Kim Kardashian, wearing a skin-tight black dress and sporting her cute bangs and sexy cleavage, celebrated the new season of Keeping Up With The Kardashians and the debut of The Spin Crowd which she's producing.

Kim K brought along some of her closest friends to ring in the reality show's success. Check out Kelly Osbourne ... still looking fit and fabulous!

Can you believe it's already the fifth season? This family rocks!

Check out the gallery below to see all the celebs that showed up to support the Kardashians on their big night.