Which of These 'Ladies' Is Not a Real Kardashian Sister?

Which of These 'Ladies' Is Not a Real Kardashian Sister?
(From left) Kourtney, Kim, "Kougar" and Khloe Kardashian
Kevin Winter/TCA 2010/Getty

08/09/2010 AT 12:00 PM EDT

Looks like there may be another Kardashian to keep up with: Meet Kougar Kardashian.

Joining Kim, 29, Khloé, 26, and Kourtney, 31, on stage at the 2010 Teen Choice Awards Sunday night, "the fourth" Kardashian sister wasn't actually lady at all. Nope, it was George Lopez in drag.

Khloé later Tweeted about her new sibling, writing, "we love our long lost sister!"

The Teen Choice Awards air Monday, 8 p.m. ET, on Fox. And while Lopez, 49, made for a hot addition to the reality family, he couldn't take all the heat away from the leading ladies of the Kardashian clan: Keeping Up with the Kardashians snagged awards for Choice TV Reality Show and Choice TV Female Reality/Variety Star.

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