William Christopher Champlin (born April 24, 1983) is an American singer-songwriter, best known for his appearance on Season 5 of the NBC singing competition The Voice as part of Adam Levine’s team. He finished in third place behind Jacquie Lee, the runner-up, and Tessanne Chin, the winner of the season.
Before his participation on The Voice, Champlin reached some success as a songwriter. He collaborated with Michael Caruso and provided backing vocals for Ace Young’s self-titled album, and also played piano on Michael Jackson’s posthumous compilation album Michael, on the song (I Like) The Way You Love Me.
He was nominated in the Best Contemporary R&B Gospel Album category, for co-writing Ordinary Me, which appears on Heather Headley’s album Audience of One. Audience of One was awarded the 2010 Grammy in its category.

He is the son of Bill Champlin