HOT TOPICS/

 Duets

Opening Act Performance: Jason Mraz and Jono
Harry Styles, Meghan Trainor
Justin Bieber, Cody Simpson, Home to Mama
Kelly Clarkson Compares "Duets" To "Idol"
Neil Patrick Harris, Jason Segel
Lady Gaga, Christina Aguilera, The Voice
Ron Burgundy, Anchorman, Robin Thicke
John Mayer, Katy Perry, Who You Love
John Mayer, Katy Perry
Katy Perry, John Mayer