Britney Spears is shaping up! She’s undergoing an intense fitness regimen to prep for a residency concert series in Las Vegas.

It’s been widely reported that Spears would be departing the talent competition show “X Factor,” as Simon Cowell revamps most of the judging panel. Even as Spears told her fans she’d leave the show, she dropped the hint that Vegas might be in her future – for what could be as long as two years headlining a casino concert venue.

Britney Spears ShapeShe tells SHAPE magazine, where she’s currently the cover model:

“I’m doing 90 minutes of yoga twice a week in addition to a lot of cardio-hour-long sessions three times a week with my trainer, Tony Martinez … The [Vegas] performances won’t be simple-they’ll be a massive party from start to finish. And to pull this off, I have to be in top condition and running at full speed.”

Ironically, it was Las Vegas where Spears once gave one of her more awkward performances – her ‘comeback’ performance at the 2007 MTV VMA’s – but now, she’s back ready to get back in peak form and put on a showstopping performance, several times a week.

Spears will reside at Planet Hollywood. The Penthouse Suite she’ll call home reportedly has its own gym, a media room and at least four bedrooms.

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