Christopher Alan "Tricky" Stewart (born January 4, 1974) is an American record producer, record executive, songwriter, and music publisher. In a career spanning over 30 years, Stewart has won 5 Grammys and is responsible for over 50 million records sold. He is noted for producing many hip hop, R&B and pop chart topping singles, often with The-Dream. Some of Stewart's record breaking singles are: Beyoncé's "Single Ladies (Put a Ring On It)" (2008), Rihanna's "Umbrella" (2007), Justin Bieber's "One Time" (2009) and "Baby" (2010), Britney Spears' "Me Against the Music" (2003), Mary J. Blige's "Just Fine" (2007), Mariah Carey's "Touch My Body" (2008) and "Obsessed" (2009), Ciara's "Ride" (2010), Mýa's "Case of the Ex" (2000), Karina Pasian's "16 @ War" (2008), and Nicole Scherzinger's "Your Lo