High School Musical's Zac Efron gets revealing on the cover of Rolling Stone this week – and his girlfriend, costar Vanessa Hudgens, is a fan of the shirtless look.

"I think it looks hot," the 18-year-old actress told Ryan Seacrest on his KIIS-FM morning radio show Thursday in L.A. "The girls like it."

But does she mind that Efron has lots of female admirers? "No," Hudgens says. "I mean, I like to scream along, too."

Efron, for his part, seems to shy away from all that attention.

"A lot of problems you see people having in this business is that is becomes about their personal lives and not about their work," Efron, 19, tells Rolling Stone in its cover story. "Matthew McConaughey has singlehandedly funded the tabloid magazines for the past two years now. If he would put on a shirt and just get away from the beach, maybe there would be a few less paparazzi around."

Efron seems to take his own advice to heart. Despite living by himself in Hollywood, the actor says he stays away from hotspots frequented by other stars his age. But that doesn't mean he doesn't have a good time.

Photo by: Courtesy of Rolling Stone
"I'm the same age as some other people who are dealing with scandals," he says. "I've got friends out here, and we do what kids our age are doing. We don't need people taking photos of us."

And while Hudgens is more effusive about her feelings for Efron, he tries to keep his love life (relatively) under wraps. In the past, Efron has told reporters about their onscreen chemistry but stayed mum about any other personal details.

In Rolling Stone, the actor reveals a bit more, saying, "The weird thing that no one expected about Vanessa is that underneath such a sweet girl ... is a very sexy woman." He blushes, though, when pressed for more details about their relationship, and demures when asked about a silver band he wears.

"This is just a ring from a friend that I got," he says. "It's a female friend, but I can's say who," he adds, "because then it would be chat-room pandemonium and teen-magazine hysteria."