Dave Matthews will be sitting out the FireAid and MusiCares benefit concerts due to a 'critical illness in the family.'

Matthews had been set to take the stage at the Jan. 30 benefit concert in the wake of the devastating Los Angeles wildfires.

Singer was scheduled to perform with John Mayer for the first time at the FireAid concert on Jan. 30, followed by a Grateful Dead tribute at the MusiCares event on Jan. 31