Part I: Joe Jonas rates Demi Lovato, Miley Cyrus, and Selena Gomez on 'PT5' and Nick and Kevin Jonas take viewer questions.
Part II: Nick Jonas reveals if he's currently dating and Kevin and Joe Jonas take viewer questions.
Nick Jonas dishes on what he loves about older women and reveals the age of the oldest woman he's dated.
Kevin Jonas hints at who he was dissing in his controversial "Plead the Fifth."
The Jonas Brothers share some advice for Justin Bieber.
Nick Jonas names his surprise celeb crush as the Jonas Brothers dish on their first times.
Part I: You might not believe what type of instrument Mariah Carey used to write “All I Want for Christmas is You.”