The 74-year-old singer/songwriter has just released one of his most successful albums, Stranger to Stranger, but that's not going to stop him from calling it a day when the time is right.

The former Simon & Garfunkel star tells the New York Times, "Showbiz doesn't hold any interest for me. None.

"I've seen fame turn into absolute poison when I was a kid in the 60s. It killed (Elvis) Presley. It killed (John) Lennon. It killed Michael Jackson. I've never known anyone to have gotten an enormous amount of fame who wasn't, at a minimum, confused by it and had a very hard time making decisions."

Paul also tells the publication songs don't come as easily as they used to, and he often needs days of voice rest after a show or recording session.

He'll turn 75 while touring Europe, and he admits his current tour might be his last, adding, "It's an act of courage to let go. I am going to see what happens if I let go. Then I'm going to see, who am I?"