John Twits, Jen Splits

Wouldn't it be awesome if Jennifer Aniston broke up with John Mayer because of Twitter?! That's what Star Magazine is reporting. And of course, you can never trust Star - but it's still a great rumor.

A source says, "John suddenly stopped calling her or returning her emails and when she would finally catch up with him, he'd say: 'I've been so busy with work. I'm sorry I haven't had time to call you back'.

"Jen was fuming. There he was, telling her he didn't have time for her and yet his page was filled with Twitter updates.

"Every few hours, sometimes minutes, he'd update with some stupid line. And in her mind, she was like 'He has time for all this Twittering, but he can't send me a text, an email, make a call?'

"He didn't even deny it. He knew he was avoiding her. So when she called him on it and ended things, he just said OK, and that he was sorry it didn't work out.

"He took the break-up like a man."