SURPRISE, SURPRISE

Wow....surprise, surprise.....now who didn't see this one coming. People reports:


Bristol Palin and her fiancé Levi Johnston have broken up.

The split happened "a few weeks ago," according to a source close to the couple, but it's unclear what precipitated it. "It was a mutual thing," adds the source.

Bristol, the 18-year-old daughter of Alaska Governor Sarah Palin, spoke with FOX News in February and told Greta Van Susteren that she and Levi – who are parents to 2-month-old son, Tripp – expected to get married after they completed high school.

"It kind of just happened," says the source, referring to the split. "I thought they would stick it out. But I think they can work together to raise Tripp."

"I'm not sure what caused [them to break up] – it's common knowledge," says another source who knows the family.

Despite the breakup, Levi still sees the couple's son. Levi's dad, Keith Johnston, told PEOPLE recently that his son is a devoted and "proud father."

Bristol, meanwhile, is attending Wasilla High, taking a class to supplement course work she is completing at home. She also is considering enrolling in college next fall and studying nursing.

GV Says: I knew d*mn well that engagement fiasco was just a sham to save face.