Zac Efron reportedly “shared a few brief kisses” with his girlfriend at a karaoke hotspot.

The 27-year-old Neighbors actor has been dating marketing professional-and-aspiring model Sami Miró since last fall.

And the High School Musical star showcased his singing skills with Sami by his side Thursday night at karaoke venue Blind Dragon in West Hollywood.

"They danced to Reggae music and the two seemed really happy," an alleged onlooker told People magazine.

"He was really affectionate with her and caressed her back while they talked to friends. They even shared a few brief kisses."

It’s claimed Zac and Sami “stuck to the people they knew” throughout the night.

But even though they didn’t mingle with the crowd too much, it’s claimed the pair still managed to have a roaring time.

However Zac, who checked himself into rehab in 2013, abstained from drinking any alcohol.

"He stood on the sofa in the room and had one of the mics and sang [along with everyone else] to Sugar Ray's Fly and the Smashmouth's All Star," the insider said.

"He seemed to be in really good spirits and he wasn't drinking and was getting a kick out of karaoke."

The couple haven’t spoken much about their relationship in the months they’ve been together.

But Sami did open up about how Zac’s celebrity status impacts their romance.

"I think that you have to take that [kind of attention] with a grain of salt, and put yourself in other people's positions,” Sami told America’s Elle.com previously. “I think that's actually a really big part of it, putting yourself in their shoes, and trying to understand where they're coming from, and then it kinds of makes sense.

"It kind of just comes with the territory, and I know there's no really changing that, so you have to just embrace it… I'm not trying to hide anything in my life."

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