Soulshock & Karlin is a duo of Danish record producers and songwriters, Carsten Schack and Kenneth Karlin. They have produced a large number of successful songs, including Monica's "Before You Walk out of My Life", Whitney Houston's "Heartbreak Hotel", JoJo's "Leave (Get Out)", and Fantasia's "Truth Is". In a reference to a famous commercial, Arena Magazine called the team, "Probably the best R&B producers in the world" (March 2001).