Gavin DeGraw's probably hurtin' bad right now ... after slipping and planting his face on some hard ice.
The "I Don't Want To Be" hitmaker hit up Bridgestone Arena in Nashville Saturday for Game 5 of the Stanley Cup Playoffs between the Stars and Predators. He was there to sing the National Anthem and absolutely KILLED. But, as he was hyping up the crowd ... he took one step too many backward and BAM!!!