FRANK SINATRA JR is speaking out about his prostate cancer ordeal after Olivia Newton-John urged him to help raise awareness about the disease.

The 62-year-old singer recently underwent surgery to remove the cancer three weeks ago, after a routine diagnosis revealed his condition.

And he names the GREASE star as a huge inspiration in his battle.

He says, "I'm the biggest coward I know. If I can go through this any man can.

"Very shortly (after the diagnosis), I had dinner with Olivia Newton-John. She said, 'You have got to get out and ring some bells about this.'"