Why did Zac fall for his leading lady? As he puts it, "She's fun!" Photo by: FRED HAYES / DISNEY CHANNEL
High School Sweethearts| High School Musical, Vanessa Hudgens, Zac Efron
These days, they've been known to stop into Robeks in L.A.for a juice after working out and to shop together. On a recent trip to the Gap in New York City, Efron – who stirs the kind of teen hysteria once reserved for Justin Timberlake – gave a 7-year-old girl an autograp , a hug and a wink. But older groupies be warned: "I am," Hudgens told PEOPLE last year, "the girl who will get jealous."

She is also the girl who will drive her boyfriend nuts with her three closets devoted entirely to shoes. Her paydays go towards expensive bags by Balenciaga and Louis Vuitton and her favorite Christian Louboutin stilettos. Efron, meanwhile, has directed his extra cash toward the bill on his first bachelor pad – a small two-bedroom apartment where he sleeps on a mattress on the floor – and used jeans. "I can get, like, eight pairs of $3 jeans," he says. "Who cares if they don't fit? I can give them back to the Goodwill. It will cost me less than one half of Vanessa's pairs of nice shoes." Personality-wise, she's the more intense, reserved one, while he's more mellow and outgoing. "He's at her whim," says the HSM source.