‘Entertainment Tonight’ welcomed the Jonas Brothers to their New York City studios, where the sibling pop trio talked with Mary Hart about the mania that surrounds them, their new movie ’3D Concert Experience’, now all three are night owls while on tour, spoiling their mother on Valentine’s Day, and their nicknames. Nick Jonas is “Mr. President”, with his brother Joe predicting he’ll be the U.S. president in 2038. Watch the interview below the fold.