They wowed Hollywood with a high-profile Oscar date, posing arm-in-arm for photographs in what was largely seen as their official coming out as a couple after a year of off-and-on dating. Then Jennifer Aniston headed to Europe to promote Marley & Me and John Mayer stayed in L.A. to work on his music.

And just days after Aniston returned, they were a couple no more, according to PEOPLE.

"They had some disagreements and decided to not continue to see each other," says one source. "Jen is moving on with her life like she always does. She seems happy."

A second source says Mayer broke up with Aniston after she returned from Europe.