Pop princess Britney Spears sure showed her motherly side on Saturday, as she surprised a class of growing girls at Rockit Dance Studio in Calabasas, California.

'Surprised the girls at @rockitdancestudio today! Thx for letting me take over your class @lenagold! They rocked it,' the 33-year-old Toxic hitmaker wrote on Instagram with a snap of her grooving with the gals.

The previous Disney star was afterward spotted as she was leaving the dance studio, appearing to have worked up quite a sweat.

It is unlikely the training will finish anytime soon either now that her Vegas residency has been pushed back two more years.

Spears announced that she will be extending her popular Vegas residency show, Piece of Me, at Planet Hollywood for two more years. She has been performing in her Vegas headlining show since December 2013 and has sold out nearly every show since.

The mother of two sons, Jayden and Sean, looked youthful in an aqua blue tank and lacy white shorts. Her messy bun and white sneakers with hot pink laces showed that Spears had spent much time rehearsing. At the end of her show last week Spears made the official announcement but will be back in Vegas in December.

'I have some big news tonight. Usually I have you guys help me count to three, but tonight I want you to help me count to two, because I'm going to be in Vegas for two more years!,' she exclaimed.

Fans celebrated and cheered violently for their Hit Me Baby One More Time singer. Spears also put the news and a video out on Twitter the following day after making her big announcement.

Fans couldn't be happier for The Pretty Girls singer as she has had a complicated summer after her breakup with Charlie Ebersol. The couple had been dating since last October but split after eight months together.