Bristol Palin-Levi Johnston Engagement Off; Briana Plum Facebook Pic to Blame!

It looks like the second engagement of Bristol Palin and Levi Johnston is off, but that the rumor of him knocking up his ex-girlfriend is not the reason.

His flirting with another ex-girlfriend is!

Bristol, 19, called off engagement #2 to Levi, 20, last week following a huge fight over one of his ex-girlfriends - and we don't mean Lanesia Garcia.

Garcia was outed as Levi's possible second baby mama this week, but new reports say that the Playgirl model is not the father of her unborn child.

Luckily for our boy, he wasn't the one among the "three potential fathers" to have impregnated Lanesia during the probable week of conception.

But Bristol Palin still has beef with him - and Briana Plum.

Levi Johnston apparently got naked a lot in between his two engagements to Bristol Palin, and we're not even talking about his Playgirl photo shoot for once.

"Lanesia and Levi have dated off and on over the past few years but he's not the father of that baby," says a source to E! Online. "Lanesia's other ex-boyfriend is the father. She's not the reason that [Bristol and Levi] broke it off."

That would be Levi's other ex, Briana: "There was an interview with her and Bristol wasn't happy about things she said. There was also some picture on Facebook of him and Briana and Bristol just said, ‘Let's hold off on the engagement.'"

Neither Palin nor Johnston have confirmed this, but the parents of 19-month-old Tripp just got engaged again a few weeks ago, landing them on the cover of Us Weekly amid rumors of shopping a reality show featuring their young family.

Guess even a huge paycheck can't keep some fake relationships intact.

Lanesia Garcia: Pregnant By Levi Johnston?!

Already famous for impregnating Bristol Palin two summers ago, Levi Johnston now finds himself embroiled in another baby scandal, according to reports.

The National Enquirer says Levi may have knocked up one of his old girlfriends during the period of estrangement between his two engagements to Bristol.

Levi and Bristol just got back together and engaged, ostensibly out of love and a desire to raise son Tripp together, but also to make some serious loot.

But if his ex-girlfriend, Lanesia Garcia, is really pregnant with his child pregnant - and she believes Levi is the daddy - that could be a tough obstacle.

Of course, it's still very much unclear if the child was sired by the Playgirl model. To put it nicely, Lanesia apparently gets around ... like a record.

BABY DADDY RELOADED? Levi better hope he shot blanks this time.

“Levi insists the baby isn’t his, but no one really knows,” a source said. “Levi is one of three possible fathers with Lanesia the probably week of conception.”

Three in one week? Wow, she sounds like a girl who really has her act together. Guess there's not a lot to do in Alaska ... well, besides Lanesia Garcia.

Still, friends of Bristol Palin say she is “heartbroken” after learning her fiancé might become a baby daddy with another girl, Radar Online reports today.

A Palin family rep says that “no official decision has been made” about the future of the couple, who are now communicating only “by text message.”

We can't wait until Sarah gets on Twitter to comment on this. Her critique of Obama for going on The View this week will seem tame by comparison.