Sigh...what could have been a match made in teen star heaven is no longer. Selena Gomez and Taylor Lautner are no longer frolicking around Vancouver together in celeb-coupled bliss. "He's one of my good friends," Selena tells Extra. "I'm single. Definitely single." So does that mean that they had been official and now they've called it quits? A source tells Us that they split because "they are just really busy." But at least he'll always be her fave Twilight star, right? Wrong! Who is it? "I'd say Robert [Pattinson]." Ouch!