The two lovebirds showed off their skills on the dance floor this weekend when they were in Hawaii for a wedding...
No, not their own!
Zac's longtime manager, Jason Barrett, was actually tying the knot, and the happy couple were there to celebrate.
"They were in such great spirits because of the wedding and because they heard early reports that HSM3 was turning out to have an amazing opening weekend," a source tells E! News.
"They are the best dancers," the source continues. "They were totally getting down on the dance floor and having the best time."
During the ceremony and outside of the reception, paparazzi were hiding in trees wearing camouflage and trying desperately to get shots of the HSM stars. But the duo didn't seem bothered and instead tried to make sure the attention was on the newlyweds.
"They were really cool with guests and made sure not to steal the spotlight from the bride and groom," says a source.
—Reporting by Giuliana Rancic