Is Emma Roberts two-timing boyfriend Chord Overstreet with Zac Efron? Emma, 20, has been dating Glee star Chord since the summer, although they have been tight-lipped about their relationship status. But an eyewitness spotted Emma and High School Musical star Zac “full-on making out” at an after-hours party hosted by Lance Bass on October 30. “Zac and Emma both wound up at Lance’s party, and before the night was over, they were all over each other,” the witness says. “They took each other's numbers and seemed into each other.” Watch out, Chord!