Bono has reportedly been ordered to lose weight before U2 release their new album and start a proposed world tour next year.

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The singer – who has been entertaining celebrity friends including Brad Pitt and Angelina Jolie and Robert De Niro on his yacht in France this summer – has been told he needs to lose his excess pounds before the band start their promotional duties again.

A source told the New York Post: “U2 have an album coming out around January. And then the band is going on another world tour in March and April – so the boys have been told to start exercising all the summer weight off.”

U2 – comprising Bono, The Edge, Adam Clayton and Larry Mullen, Jr – are rumoured to be calling the new record, their first in four years, No Line On The Horizon.

Tracks on the LP have been leaked on the internet after a fan recorded the music from the upcoming record that Bono was playing in his French villa.

The four leaked songs are believed to be called Moment of Surrender, For Your Love, Sexy Boots and No Line On The Horizon.