Teen heartthrob Zac Efron has presented his High School Musical co-star GF Vanessa Hudgens with a ring as a token of his commitment to their young love. In late January, Zac presented Vanessa with a $325 sterling-silver heart-shaped ring designed by Paloma Picasso. The jewel, which boasts a tiny diamond chip, is described as “adorable and age-appropriate for Vanessa. It’s from him, so she loves it,” a friend of the couple tells In Touch Weekly.