Pop star Britney Spears surprised a group of young dancers by filling in as their instructor on Saturday (19Sep15).

The Toxic hitmaker paid a visit to the Rock It Dance Studio in Calabasas, California, shocking a class filled with eager young girls.

The singer took to Twitter.com to share photographs and videos of her afternoon in the studio as she taught them moves to Madonna's Give Me All Your Luvin'.

In one shot, Spears is seen leading the class while surrounded by the dancers, adding the caption, "Surprised the girls at @rockitdancestudio today! Thx (thanks) for letting me take over your class @lenagold! They rocked it!"

In one video, Spears and the dancers are seen jumping around the studio for what the pop star dubbed a "happy dance", while another video of the girls performing the routine has the accompanying caption, "L-U-V dancing to my girl @madonna."

In the final video, Spears gushed, "Today was so much fun!"