Maureen "Mau" Flores Marcelo is a Filipina soul singer and composer who rose to prominence as the first winner of Philippine Idol in 2006. She was dubbed as the "Soul Idol" and "The Black Belter" at the competition for her R&B-style vocals. She was also called "Philippines' Diamond Diva" after her much-applauded performance of "Diamonds Are Forever" by Shirley Bassey during the Movie and Musical Theme Week.
For a time, she went by the stage name Samantha Brown, based on her father's surname.
She was also the Philippine representative to Asian Idol, which was held on December 15 and 16, 2007 in Jakarta, Indonesia.