Jen & John: Together Again?

It’s déjà vu for Jennifer Aniston and John Mayer –it seems the on-again, off-again, on-again couple are back together, at least for the time being. On Feb. 1, the twosome attended a Super Bowl party in Calabasas, Calif. It was their first full day together since their New Year’s Eve trip to Los Cabos, Mexico.

“They attended a party at a friend of John’s and stayed for the entire game,” an eyewitness tells OK! “Who knew Jen even liked football?”

The crooner, 31, then drove back to 39-year-old Jen’s Beverly Hills estate. After not seeing each other for almost a month, the pair began dabbling with coupledom just two days earlier.

“The Friday before the game, they attended separate dinner parties and then rendezvoused at Jen’s house, where John stayed until midafternoon on Saturday,” a source says.

That evening, the Marley & Me actress attended Ellen Degeneres and Portia de Rossi’s joint birthday party at their Beverly Hills mansion. “John wasn’t there, and it seems he’s rarely included in gatherings with Jen’s friends,” says the source.

Another telling sign was John's absence at the premiere of his girlfriend's latest movie, He's Just Not That Into You in L.A. on Feb. 2.

“The big question is, will Jen have John with her for her 40th birthday on Feb. 11?" asks the insider. "Even Jen may not have decided on that one!”