Several days ago, one of our photo agencies had photos of Zac Efron getting out of his car in front of Vanessa Hudgens’ house. They made a big deal about Zac visiting her or spending time with her just weeks after the two split. I didn’t do a story about it because A) Who really cares, really? And B) Exes don’t have to hate each other after they split up, and Zac and Vanessa seem like the kind of kids who would remain friends anyway. However, now the whole thing looks official – Zac and Vanessa are back together. Either that, or they’re just enjoying some “breakup freebie sex”.

Could Zac Efron and Vanessa Hudgens be back on? The couple of nearly five years — who parted ways in early December — came together Friday for an outing at Los Angeles nightclub Eden.

And their reunion seemed to go off without a hitch. Stopping by the hotspot’s opening bash, Efron, 23, and Hudgens, 21, kissed and danced the night away with pals, including actress Brittany Snow.

“The two showed up around 10:45 p.m. through the back entrance with a group of friends and were holding hands at different points throughout the night,” a source tells UsMagazine.com. But the High School Musical costars were careful to keep a lid on their PDA.

At one point in the evening, when Efron leaned in to kiss Hudgens, the actress pushed him away after spotting a clubgoer who tried to snap a cellphone photo.

“They were kissing on the lips and seemed to be enjoying their night,” says the source. Adds another eyewitness: “They seem to be back together.”

The pair’s display of affection comes mere weeks after their mutual split was announced.

“There’s no drama. No one cheated. They just grew up,” an insider told Us at the time of the breakup.

[From Us Weekly]

So, they’re back together. My theory: last month, Zac had a moment of “The grass is always greener” so he dumped Vanessa and decided to see what his options were for a potential girlfriend upgrade. Then he encountered Rumer Willis during a New Year‘s holiday. Then he went running back to Vanessa. Just my theory!

Photos courtesy of WENN.