Cook was set to play at college campuses in New Hampshire and Connecticut.

The "Light On" singer's rep didn't elaborate on what those matters were, but People reports that Cook's brother Adam has battled brain cancer for over ten years and the rep confirmed that David spent time with his brother last week.

Cook will return to the stage where he beat out baby-faced David Archuleta for the AI title last year in a taped performance set to air on Wednesday.

A message was posted on his official website that read "David would like everyone to rest assured that we are working with the universities to reschedule the shows that are missed."