"X Factor" judge Britney Spears’ new Fantasy Twist perfume commercial definitely has the sex factor. Halloween came early for Brit, who got to dress up as Cleopatra, Jean Harlow and even a dark dominatrix for the ad.

Fantasy Twist is the latest scent in the singer’s multi-million-dollar fragrance line, and only “Extra” got a behind-the-scenes look. Watch!

The pop star’s perfume is part of her growing empire. Right now, she’s No. 2 on list of Forbes’ Highest-Paid Women list with $58 million in earnings between May 2011 and May 2012 – just behind Oprah Winfrey.