Tommy James had to abruptly end his concert in Las Vegas last Friday after suffering from exhaustion.
The Mony Mony singer was performing at the Golden Nugget casino on 7 March when he stopped singing about an hour into the show.
The Las Vegas Review-Journal reported audience members saying the 77-year-old began to breathe heavily and sat in front of the drums to recover.
Representatives for The Golden Nugget told the outlet that paramedics and casino security treated James on site, and he left without incident.
Carol Ross-Durborow, a rep for James, told Fox News Digital he stopped the show "due to exhaustion".
James is scheduled to play a show next weekend in Tulsa, Oklahoma.
James has released 12 solo studio albums since the start of his career in the 1970s, and eight with Tommy James and the Shondells. The band is best known for the hit singles Mony Mony, covered live by Billy Idol in 1987, and I Think We're Alone Now, which was a huge hit for pop star Tiffany that same year.
He performed another of his hits, Crimson And Clover, with Joan Jett & the Blackhearts during the latter's Rock and Roll Hall of Fame Induction ceremony in 2015.
In an interview with Jersey Sound last year, James reflected on his career, saying, "I look at my career and I see how I've been so blessed in so many different ways. And that's really the truth."
