Did Zac and Vanessa Split?

After five years of dating, Zac Efron and Vanessa Hudgens officially broke up in December. "They were together for so long. It just ran it's course," a source says. "There's no third party involved." The stars, who first hit it off while auditioning for High School Musical in 2005, kept their relationship is not very interesting," Zac said last summer. "But it's exactly how it should be it's real.