Christopher Alan "Tricky" Stewart is an American record producer, record executive, songwriter, and music publisher. Stewart, a five-time Grammy Award recipient, began producing music in 1992 and has contributed to unit sales of over 50 million for his work on hip hop, R&B and pop releases. Often in tandem with production partner and R&B singer The-Dream, he has been credited on the singles "Case of the Ex" (2000) by Mýa, "Me Against the Music" (2003) by Britney Spears, "Umbrella" (2007) by Rihanna, "Just Fine" (2007) by Mary J. Blige, "Single Ladies " (2008) by Beyoncé, "Touch My Body" (2008) and "Obsessed" (2009) by Mariah Carey, "One Time" (2009) and "Baby" (2010) by Justin Bieber, "Ride" (2010) by Ciara, and "Water" (2023) by Tyla, among others.