'High School Musical' sweethearts Vanessa Hudgens, 21, and Zac Efron, 23, announced last month that they were breaking up amicably after nearly five years together.

But now, they may be singing a different tune. Eyewitnesses report seeing the two canoodling in Los Angeles this weekend, suggesting the romance may not be over, after all.

At the opening of LA nightclub Eden Hollywood, "The two showed up around 10:45PM through the back entrance with a group of friends, and were holding hands at different points throughout the night," a source on the scene tells Us Weekly.

And reportedly, more PDA was spotted as Efron and Hudgens enjoyed their night on the town with pals, including actress Brittany Snow.