Rocker Chris Daughtry has filmed a heartfelt apology for walking off stage Friday from “FOX & Friends,” saying he was “off the clock” and apparently refusing to play a patriotic sing-along for the crowd in honor of D-Day.

In the video, Daughtry says he was unprepared and caught by surprise by the request and panicked. “It was absolutely disrespectful,” he says, adding, “the worst part of all, I didn’t honor our troops, I didn’t honor our vets who so deserve it.”

Related:

‘No longer a fan’: Viewers angered after singer Chris Daughtry goes ‘off the clock’ on D-Day