Lukasz Sebastian "Luke" Gottwald (born September 26, 1973), better known as Dr. Luke, is an American songwriter, record producer, multi-instrumentalist, and remixer. Dr. Luke's professional music career began in the late night television sketch comedy Saturday Night Live as its house band's lead guitarist in 1997 and producing remixes for artists such as Bon Jovi and Gravediggaz. He came into music prominence in 2004 for producing Kelly Clarkson's single "Since U Been Gone" with Swedish record producer Max Martin.