Miley Cyrus and Liam Hemsworth split up more definitively than ever before

Split: Miley Cyrus, 20, and Liam Hemsworth, 23, after a 15-month engagement that had been largely consumed by reports of subsequent breakups, makeups, etc. She's the former Disney Channel starlet turned pop singer; he's Australian actor of "Hunger Games" fame. Reps for both very young stars confirmed to People Monday (after days in which bloggers had painstakingly tracked such evidence as her unfollowing him on Twitter) that yes, it's really over this time. But the split is amicable and they rem...