Christopher Alan "Tricky" Stewart (born January 4, 1974) is an American songwriter, music producer, music publisher, executive producer, recording industry executive and recording studio owner. He is also a former president of A&R at Epic Records. In a career spanning over 20 years, Stewart, at the helm of his company RedZone Entertainment, is responsible for over 25 million records sold. He is noted for producing many hip hop, R&B and pop chart topping singles, such as Mýa's "Case of the Ex" (2000), Britney Spears's "Me Against the Music" (2003), Rihanna's "Umbrella" (2007), Mary J. Blige's "Just Fine" (2007), Mariah Carey's "Touch My Body" (2008) and "Obsessed" (2009), Jesse McCartney's "Leavin'" (2008), Beyoncé's "Single Ladies (Put a Ring on It)" (2008), Justin Bieber's "Baby" (2010), Ciara's "Ride" (2010), Nicole Scherzinger's "Your Love" (2014), and many others.