Flashing her washboard stomach as she left the X Factor studios last Sunday, it’s no wonder Leona Lewis had a big smile on her face.

The east London-born singer has dropped a dress size and is now a healthy size 12 after getting in shape for the launch of new album Echo.

Leona certainly didn’t have her super-taut tummy at 95.8 Capital FM’s Summertime Ball back in June.

Lonely Leona, 24, gained a stone over the summer while locked away recording her album in LA.

Missing her friends and family, the 5ft 7in star comfort ate her way from 9st 7lb and a size 12 to 10st 7lb and a size 14.

A source close to Leona tells: ‘In LA she used to binge on curry, macaroni cheese and her favourite Thai takeaway, all delivered to the studio. American portions are so big it’s hard not to put on weight and Leona loves every kind of food that’s bad for you.

Leona Lewis has recorded the signature song for eagerly anticipated science fiction film Avatar.

The former X Factor winner sings the track I See You during the closing credits of director James Cameron’s upcoming movie, which is expected to set new standards in big screen special effects.

A message on Leona’s website said: “We are proud to announce that Leona will record the signature song to the upcoming science fiction film, Avatar.”

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