Now, days after Patridge's split with the rocker, she was spotted at Los Angeles International Airport returning from a Costa Rican getaway with none other than Bobby.
So are these stormy exes ready for more motorcycle rides and another crack at things?
"Nothing is going on between Audrina and Justin," says a source. "She didn't even realize he would be in Costa Rica until she arrived."
Patridge, 25, instead spent the trip filming for The Hills and hanging with the girls. "She traveled and stayed with Stephanie Pratt during the trip and they had a great time surfing, hiking and enjoying the sounds of monkeys on the roof of their villa," says the source.
So can Justin Bobby work his way back into Patridge's newly single heart? Says the source: "He's just part of the show again now so she has to deal with him being where she is from time to time."