“I have someone else that takes over when it’s time for me to work and when I’m on stage, this alter ego that I’ve created that kind of protects me and who I really am,” explained Beyonce Knowles, singing superstar and movie maven.

Who is this alter ego, this doppelganger who looks like Beyonce but acts provocative? From now on, you can just call Mrs. Jay-Z Sasha Fierce. Her new album “I Am…Sasha Fierce” debuts November 18 and the ad campaign has already begun among a blitz of public relations ops and even a weird MySpace page.

“Sasha Fierce is the fun, more sensual, more aggressive, more outspoken side and more glamorous side that comes out when I’m working and when I’m on the stage,” Knowles explained…or should I just call her Sasha? View the Sasha Fierce MySpace page for your opportunity to win a personal message and gift bag worth $500.

Is all this just about her new album…or is Beyonce really undergoing a name change?