Bobby Rydell continued to perform for fans around the world, even after battling alcohol abuse, receiving a kidney transplant and a liver transplant, and undergoing cardiac bypass surgery, according to the Pittsburgh Post-Gazette. He especially loved performing with fellow singers Frankie Avalon and Fabian. 

"When the three of us are onstage, we're having fun," Rydell said in a 2012 interview. "We're not trying to fool anybody. Everybody has known us for the better part of 50 years. We just go out there and have fun and the audience can see that."

Rydell leaves behind two children, Jennifer and Robert, whom he shared with his late wife, Camille, as well as his second wife, Linda (per The U.S. Sun). 

As news of his passing spread, some famous fans expressed their condolences. "Bobby Rydell passed on. What a shame! He was the most talented of the 50s and early 60s teen idols. Well...maybe a tie with Bobby Darin," Stephen King wrote on Twitter. And "General Hospital" star Kin Shriner shared, "R.I.P. #BobbyRydell a huge fan I was!"