Beyoncé Knowles has gone platinum blond for Pepsi. We don't know how long the change of hair color will last, but it is a bit startling. She premiered the new ad for The Mrs. Carter Show tour on her Facebook page. In the campaign, Beyoncé paired the pale hair with bold dark brows and a bright red lip color. Perhaps this is a preview of her onstage look for the world tour? In her previous Pepsi ads she also sported blond locks with an Andy Warhol pop art theme. It's all very reminiscent of Marilyn Monroe, but with a heavy dose of Sasha Fierce, too.