Best of 2010

It's a Bust! The Year's Biggest Splits

Scarlett Johansson & Ryan Reynolds! Zac Efron & Vanessa Hudgens! This year brought dramatic changes to long-standing couples

JENNIFER & JAMIE

Two months after breaking off her engagement to Scottish actor Ross McCall, Jennifer Love Hewitt found love – and laughs – with her Ghost Whisperer costar Jamie Kennedy. Though the pair often gushed about each other, they quietly ended their year-long romance in March – ironically, just as Hewitt's new advice book on dating and relationships, The Day I Shot Cupid, hit bookstores.