You already know the three Kardashian sisters: Kim, Khloe, and Kourtney. But did you know there's another fashion-forward, heart-breaking Kardashian sister? World, meet Kougar Kardashian. In a segment called "Hollywood Secrets" on "Lopez Tonight," George Lopez has an exclusive interview with the unknown Kardashian sister. Check out the preview below, and tune in TONIGHT, Tuesday Aug. 24 to see the rest of Kougar's Hollywood secrets. "Lopez Tonight" airs on TBS at 11 p.m. ET/PT and at 10 p.m. CT.