Former Sugababes star Mutya Buena has confessed to a drug-taking past. Buena, 21, admits she dabbled in drugs during her younger days and the lyrics to her upcoming debut single REAL GIRL deal with those times. She says, "(The song) is about drugs. It's sung from the perspective of a friend standing there watching someone kill themselves. It's a wake-up call. "I'm no saint, and I try not to judge, but I know right from wrong."