LISTEN: Adele's new album '25' leaks online
Adele just dropped a video for her new song 'When We Were Young'
Justin Bieber surprises fans with one new video for 'Purpose' each hour
Missy Elliott drops first brand new track in 7 years
LISTEN: Epic mashup of 2015's biggest pop songs
Sia picks a NEW STAR for her 'Alive' music video