How quickly things change when you're a tween starlet. Miley made our 2009 list for her romance with
Justin Gaston, which met a sad fate over the summer. But when she started work on her movie
The Last Song, she fell for her hunky Aussie co-star Liam, whom she's been dating ever since. She's described him as her "soulmate," but we have doubts about their longevity: After all, she's only 17!