It’s all thanks to cutting down on booze, rigorous training and a radical diet plan

Showcasing a new slimline figure, Christina Aguilera grabbed the headlines for all the right reasons at the Billboard Music Awards in Las Vegas last week.

At her heaviest Christina, 32, tipped the scales at 10st 7lb in late 2012.

But she’s shed around 2st and dropped from a size 16 to a 10 by working out five days a week with long-term personal trainer Tee Sorge, following an 1,800- calorie daily diet and cutting down on booze.

Christina got her drinking down to two days a week, usually at the weekend.

‘She just has a glass of wine with dinner,’ says a source.

The singer admits it’s all about moderation.

I’m not into depriving myself. I just limit the bad food I like,’ she explains.

Sources say her romance with toyboy Matthew Rutler, 28, could have inspired her to shed the pounds.

Just last month US mags reported she was getting in shape to marry the production assistant, who she met on her film Burlesque.

Christina‘s losing weight because she and Matt are planning to tie the knot this summer,’ revealed an insider.

Her weight ballooned after her divorce from Jordan Bratman in late 2010 after five years of marriage.

Admitting she’s an emotional eater, Christina said then: ‘It’s more mental than anything – food is comforting.’

Reports estimate the 5ft 2in singer gained up to 2st 8lb by gorging on pizza and partying with Matthew.

But last week she wowed in an eye-catching little black dress on stage with rapper Pitbull at the Billboard Awards.

Read more about Christina Aguilera in this week’s Now magazine dated 3 June 2013 – out now!

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SEE PICTURE Christina Aguilera in W magazine

SNAPPED! Christina Aguilera and Matthew Rutler in Brazil

NEW PICTURES Christina Aguilera at Burlesque film premiere