BBC News
By Mark Savage
image copyrightGetty Images
image captionThe star says he still warms up his voice by singing his 1967 hit single Delilah
There's a fascinating clip on YouTube of Sir Tom Jones interviewing Stevie Wonder in 1993.
For most of the conversation they're on an equal footing, whether reminiscing about their childhood or duelling over the vocals on Superstition. But then Sir Tom brings up Wonder's writing.
"It's great you can express yourself but I'm not a songwriter," he confesses. "I can't do that. I have to sing songs that are already there."
The moment is laden with pathos. Sir Tom is both in awe of Wonder's work, and humbled by his own inability.