We've heard of singing in the mirror.
But Billie Piper's brought a whole new concept to the game.
And it doesn't involve clothes.
Eek.
The pregnant actress told Jo Whiley on Radio 1: "I'm revisiting early Janet Jackson.
"I attempt the dance routines naked in front of the mirror, just to make myself laugh."
Well, we admit it sure sounds like fun.
But we're not so sure we'll be following your lead just yet, Bil, we're a little shy.
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