No. 5: Taylor Swift

We know Justin and Taylor have great chemistry based on their ‘Punk’d’ shenanigans. In fact, the setup for that practical joke was that Swift was supposed to meet with Bieber to write a song. With the hijinks behind them, it’s time these two make it happen for real. Swift is a master at writing lyrics the average teen can relate to, and adding Bieber’s perspective to the process could result in some engaging songs from two of music's brightest stars.