We'll never quite understand why Miley Cyrus dumped her sexy underwear model beau Justin Gaston back in June after nine months of dating, but apparently the teen queen has moved on with ease. It's been reported that she and her "Last Song" co-star Liam Hemsworth are now an undercover item. Jean Baptiste Lacroix/WireImage.com - March 8, 2009
Celebrity Breakups of '09
From Jon and Kate to John and Jen, check out this list of 2009's biggest breakups.