Whose New Body?Who's this going for a run in the Californian sunshine?

She's always been a diddy one but put on the pounds recently after a break up.

You oughta know this one...

It's none other than Canadian singer Alanis Morissette.

As the snap below shows, Alanis packed on the pounds after her engagement to Ryan Reynolds ended in 2007.

Alanis admits she was "indulgent for a good nine months".

But as these pics show, this lady's a fighter. She's worked off a reported stone and a half in just a few months by going on daily runs.

And we think she looks incredible.

According to US OK! magazine she's cut out processed and dairy-rich foods and is following a healthier vegan diet of fruit, vegetables, beans and nuts.Alanis Morisette

Alanis told the mag: "I used to get out of bed in the morning and things were aching, and I just thought this is what happens when you get into your 30s.

"But now I jump out of bed and have so much energy; I feel very alive. Even after a workout, I feel like if I rest a little bit I could go out dancing all night, so that’s exciting."

Alanis wowed the audience of The Tonight Show With Conan O'Brien last week in a stunning monochrome short strappy dress and matching heels that showed off her shapely pins.

She looked happy and relaxed as she chatted with Conan, showing that her new lifestyle is having lots of positive results.

Alanis, who's dating environmental lawyer Tom Ballanco, has her eyes on the prize and is now in training for a marathon.

She said: "I do between a half hour to an hour of light weights, running, biking, swimming, probably five times a week. I also love to kickbox and dance.

"I’m back to what I was born to be, at my best."

Alanis, we salute you.

Come take a look at her new bod in full in our gallery below.