Smash Mouth Singer Has On-Stage Meltdown [VIDEO]

Smash Mouth singer Steve Harwell had a night to forget during a show in upstate New York over the weekend.

Video footage posted to social media shows a seemingly intoxicated Harwell slurring his words, cursing out the audience, and at one point giving what appeared to be a Nazi salute.

The 54-year-old Harwell recently returned to the stage after taking a hiatus due to heart issues - during which he was replaced with an unidentified 'mystery singer'.