Jennifer Aniston is officially a couger! Sorry Jen. The star of the hit movie "He's Just Not That Into You" is celebrating a milestone birthday today: the big 4-0! We're hearing that Jen's Grammy winning boy-toy , 31-year old John Mayer even wrote her a special birthday song to mark her special day.
We found out about the song from a surprisingly source: Guy Sabastian, the winner of Australian Idol season one.
In a twitter post, Guy says he "had to stop recording cause Mayer wanted to borrow his band back to record a song for Jennifer in the studio... All the girls go...awwwwww."
We don't know what the song is about or if John has sung it for Jen yet, who threw herself an early birthday bash at her Beverly Hills home last Saturday Night.
We're also waiting to find out if John is going to pop the question to Jen today. That's all the buzz.
Yes, he REALLY is just that into her.
Happy Birthday Jen!