H'wood's On-Off Couples

Jennifer Aniston and Jon Mayer can't seem to let go of each other. According to UsWeekly.com, the lovebirds are back together. The two broke up most recently in January 2009. "He really got to her, and she's hooked on him," a source told Us Weekly. "She just can't let go." The source went on to say that the two met at the Four Seasons Hotel in New York City Sept. 22, 2009. (Kevin Mazur/VF/WireImage for Vanity Fair)