No Doubt is back - and so are Gwen Stefani's super-toned abs! 

The mum-of-two - who turns 40 in October - has regained her rock royalty crown (and body to match) with ease.

This weekend she took to the stage looking as hot as she did nearly 15-years-ago, when her ska-punk band first hit the charts.

Fans in Vancouver were left in awe by her washboard tum, as she sung her way through hits like, I'm Just A Girl, in her trademark tiny tank top.

Although she looks to be in incredible shape now, the singer has readily admitted it's been hard to shift those pregnancy pounds.

"It's so much work afterward to get the weight off. It's an ongoing battle and it's a nightmare," she has confided.

The tour has been described by Stefani as the 'procrastination tour' - explaining she had originally planned to write material during her second pregnancy, but spent more time eating. 

Well, we don't believe a word of it. By the looks of these pics the star was actually busy working those abs. Jealous? - erm yes!

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