What is the name of this song?

It's by Sophie Ellis-Baxtor, or however you spell the name. In the music video, it's night-time in the streets, she wears this fancy light blue (baby blue?) dress, and she's dancing or acting like a robot. And there along the streets, there's shops with mannequins. And if I'm not mistaken, the mannequins start dancing too. It's bugging me! What's the name of the song?!