JLS' Aston Merrygold hits the gym with Louis Smith, Tinie Tempah hangs out with birthday boy Usher, Jessie J works hard on her new album and The Saturdays continue their LA stay in this week's round-up of the best pictures from Twitter.
"For the people asking... Here it is. My bum falling out the back of the chair... #amigoingtoregretthis? Lol".