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Kim had a late night at her wedding rehearsal dinner but that didn’t keep her from getting up for an early morning workout session with her trainer!

Kim Kardashian‘s enviable figure is the result of dedication and a lot of sweat! The Keeping Up With The Kardashians star told her fans via Twitter Aug. 18 that she had such a fun but long night at her rehearsal dinner with fiance Kris Humphries, that she was going to sleep in. But did she get her beauty sleep? Nope! Kim woke up bright and early to hit the gym with celebrity trainer Gunnar Peterson.

“Even when I could sleep in I woke up early!” Kim tweeted. “Great workout @Gunnar!!!”

Vera Wang designed not one but three gowns for Kim and the reality star reportedly can’t decide which $25,000 dress to choose! We don’t blame Kim for wanting to look good on her big day — the whole world will be awaiting her Aug. 20 nuptials!

— Chloe Melas

Krazy For Kim K? Get All The Wedding News HERE!

1. Kim Kardashian’s Dream Wedding Sabotaged By ‘Momzilla’ Kris Jenner?
2. Kim Kardashian Kicks 50 People Out Of Her Wedding — Did Justin Bieber Get The Boot?
3. Are Kim K & Kris Humphries Getting Married At The Same Home Where J. Lo & Ben Affleck Almost Tied The Knot?