Ryan Tedder
Ryan Benjamin Tedder (born June 26, 1979) is a Grammy winning American singer-songwriter, record producer and multi-instrumentalist. He is best known as the frontman of the pop rock band OneRepublic, though he has an independent career as songwriter and producer for various artists such as Adele, Ashley Tisdale, Jennifer Lopez, Beyoncé, B.o.B, Kelly Clarkson, K'naan, Far East Movement, Carrie Underwood, Adam Lambert, Jordin Sparks, Leona Lewis, Gavin DeGraw, David Cook, Demi Lovato, Sebastian Ingrosso, Maroon 5, Gym Class Heroes, T-Pain, The Wanted, Zedd, Paul Oakenfold and Delta Goodrem.
source: Wikipedia