Nicki Minaj: Rainbow Tipped Hair at CD Signing!

Nicki Minaj signs copies of her new album Pink Friday at Best Buy Union Square on Tuesday (November 23) in New York.

The 25-year-old rapper rocked rainbow tipped hair, which she debuted earlier that day while unveiling Pink 4 Friday lipstick at the MAC store in Times Square.

Over the weekend, Nicki attended the 2010 American Music Awards where she sported green tipped hair and plugged her album while presenting on stage.

Pink Friday is available in stores now!!