Ryan Tedder

Ryan Benjamin Tedder (born June 26, 1979) is an American singer-songwriter, Grammy Award winning 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, Jennifer Lopez, Beyoncé, B.o.B, Kelly Clarkson, 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, and Paul Oakenfold.

Work with Sky Ferreira
He worked with Ferreira on the following song(s):

From Obsession - Single (2010):
 * "Obsession