He detto as much in an interview he did in Londra while promoting My World 2.0. Basically he detto that it depends on the situation, but that he would do it. Justin isn't only up for dating other stars, he would data anyone if she was the right sort of girl.
And another detail: Justin likes girls with nice smiles, pretty eyes and who can make him laugh. This is his descrizione of his dream girl. Do te fit the mold? The te may be just right for Justin!