Robbie Williams sheds the pounds for Take That tour

The Angels singer's weight has fluctuated over the years. He is said to have already shed 42lbs in preparation for the group's upcoming tour – their first since Robbie rejoined last month.

Fitness instructor Nick Hollender said he is even getting the Robster to practice his vocals while he works out. He told The News of the World, 'I make him run on the treadmill and sing all his songs without missing a note.

'He has to catch up to band mates Gary Barlow, Mark Owen, Jason Orange, and Howard Donald who have been on tour much more than him. He's not going to be left behind and wants to be trim and healthy, instead of feeling like the podgy member.'

The 36-year-old reportedly peaked at 203lbs once he moved to Los Angeles, but Nick said the star is well on his way to being ready for the tour next May.

'Robbie is now training like a full on athlete,' he added. 'We need to make sure he can perform the dance moves and sing at the same time.'