Justin Bieber's holiday getaway with Selena Gomez ended with the couple splitting up. Again.

Bieber and Gomez flew to Mexico to celebrate New Year's Eve together but before they could ring in 2013, they had an argument that caused them to go their separate ways. Selena flew out of Mexico December 30th, while Justin left the next day.

A source said: "They keep breaking up and getting back together. It's an on-again, off-again relationship. It's probably not correct to characterize this as a final breakup. She's been giving him a really hard time. She's been partying without him, and it drives him crazy."

Source: Oh No They Didn't!