Soulshock & Karlin is a Danish songwriting/production duo, consisting of Carsten Schack and Kenneth Karlin. They have produced many successful songs, including 2Pac's "Do for Love", Monica's "Before You Walk Out of My Life", Whitney Houston's "Heartbreak Hotel", JoJo's "Leave ", and Toni Braxton's "I Love Me Some Him". In a reference to a famous commercial, in March 2001 Arena Magazine called the team "probably the best R&B producers in the world".