Ryan Benjamin Tedder is an American singer, songwriter and record producer. He is best known as the lead vocalist for pop rock band OneRepublic, though he has an independent career as a songwriter and producer for various artists such as Madonna, U2, Adele, Beyoncé, Birdy, Maroon 5, Demi Lovato, Ellie Goulding, B.o.B, Ariana Grande, Kelly Clarkson, K'naan, Carrie Underwood, Hunter Hayes, Jennifer Lopez, Jordin Sparks, Leona Lewis, Gavin DeGraw, Sebastian Ingrosso, Gym Class Heroes, Westlife, One Direction, James Blunt, Taylor Swift, Ashley Tisdale, Gwen Stefani, Far East Movement, Paul Oakenfold, Ella Henderson, Selena Gomez, Natasha Bedingfield, Jennifer Hudson, David Cook, Adam Lambert, Delta Goodrem and Tessanne Chin. Tedder's production and songwriting work has proven successful commercially. "Apologize", "Bleeding Love" and "Halo" made it to the list of best-selling singles of all time. In early 2014, Billboard named him "The Undercover King of Pop" and featured him on the magazine's cover.