High School Musical stars, Zac Efron and Vanessa Hudgens called it quits back in June. But less than two months later, handsome young Zac has already found a new, unlikely romance with Hairspray costar Nikki Blonsky, Star Magazine reports in this week's issue. Vanessa, who plays Gabriella Montez, and Zac (Troy Bolton) ended their two-year relationship because sources say, their … [Read more...] about Zac Efron & Nikki Blonsky’s Secret Off Screen Romance?