Let's be clear: the relationship between Liam Hemsworth and Miley Cyrus was pretty much over weeks ago, long before the latter Twerked up a storm at the MTV Video Music Awards.
So Miley's racy routine at that event didn't cause this couple to break up... but it didn't exactly help matters, either.
"When he saw her performance and the backlash it created, it was the nail in the coffin,” an insider tells Radar Online. “That was all he needed to finally break up with Miley once and for all. He was embarrassed, disgusted and mortified by her performance.”