10. Brody Jenner and Jayde Nicole

The Hills Brody Jenner and 2008 Playboy Playmate of the Year Jayde Nicole broke up after about 15 months together, according to a source close to Brody.

Nicole, 23, hinted at the split on her Twitter around 8pm Dec. 18 with a wistful entry: "'Sometimes when you truly love someone you have to let them go.....I never really understood that quote until now." The night before, however, the former Playboy Playmate was feeling festive. A source said that Nicole "celebrated her breakup" with a 12-strong crew of girlfriends at Hyde Lounge in West Hollywood.