Britney Spears reportedly gave up alcohol in order to shed 10Ibs for her comeback video.

The former bloated pop star's figure understandably began ballooning after two pregnancies and a meltdown, both of which included some heavy-duty comfort eating.

A source tells The Daily Mail, “Britney realised that things had to change in her lifestyle if she was ever going to have a chance to claw back her crown.

“Her appearance at this year's MTV video awards really gave her a boost and the confidence to continue with her plan of getting her life back on track.

The source adds, “That's why she has decided to give up drinking alcohol, because not only does it cause weight gain but she wants to be on the ball.

“Britney has lost 10Ib since giving up her one remaining vice, which obviously she is ecstatic about."

See Britney shed more than just her weight in the video for new single Womanizer here