Welsh singer Tom Jones has revealed that the late King of Rock and Roll, Elvis Presley, had once serenaded him in the shower while he was naked.

Jones, 70, who had been good friends with Presley until his death in 1977, revealed that latter was so eager to make him hear a song that he started crooning over the shower door.

"He came with a song one time that he'd heard and he felt it would be a good song for me, and so he couldn't wait for me to... I came off the stage and I said 'Elvis, hang on I've got to get in the shower'," the Sydney Morning Herald quoted Jones as saying.

"So, I'm in the shower and I hear him singing. I thought I was going mad but I looked up and he was leaning over the shower door singing this song to me," he added.