Are Vanessa Hudgens and Zac Efron Back Together?

Vanessa Hudgens and Zac Efron called it quits in December after 5 years of Disney star bliss, but it's looking more and more like that "break up" was more of a nice break. Sources say the two were acting like much more than friends while at the opening of Hollywood hotspot Eden last night.

"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 said (via Us magazine).

And, apparently at one point during the evening Zac leaned in for a kiss, and Vanessa only pushed him away because a bystander pulled out a camera phone. Otherwise, it sounds like the night was full of PDA from these two.

"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."