LL Cool J hosts the 56th annual event, held at the Staples Center in Los Angeles. Scheduled to perform: Lorde; Katy Perry; Taylor Swift; Paul McCartney; Ringo Starr; John Legend; Macklemore and Ryan Lewis; Keith Urban; Kacey Musgraves; Metallica; Pharrell Williams; Daft Punk; Sara Bareilles; Carole King; Stevie Wonder; Blake Shelton; Pink; Kendrick Lamar; Imagine Dragons; Robin Thicke; Chicago; Merle Haggard; Willie Nelson; Kris Kristofferson; Nate Ruess; Lang Lang; Nile Rodgers.