Zac Efron
"High School Musical" star Zac Efron created quite a stir when he revealed his romantic involvement with Vanessa Valladares, an Australian waitress. The couple appeared to be in a great place, as evidenced by Valladares moving into Efron's lavish Australian home just three months after they began dating. However, it was reported that their divergent life goals and Efron's fame contributed to the relationship's demise after 10 months.