Justin Bieber is a fan of hit teen movie franchise Twilight

The pop star was asked to choose between the popular vampire saga and the equally popular Harry Potter series, but struggled to make up his mind.Justin, whose movie Never Say Never won Best Jaw-dropping Moment at the MTV Movie Awards last night, had to think hard before choosing Twilight.' can't say!' he told MTV, 'But if I had to choose. Twilight over Harry Potter.'The teen heartthrob also