The story goes that the Beatles opened for Roy Orbison when they were up and coming and Roy was at the top of his game and touring the UK. And that before the tour ended, Roy was opening for the Beatles (people were leaving when the Beatles were finished playing).
Here is a Roy Orbison song, "Leah," from which the Lennon/McCartney borrowed a couple of melodic fragments for use in "Hey Jude." "Make a pretty necklace for Leah" became "Remember to let her into your heart" and "Leah, Leah, Leah" more or less becomes "Better, better, better..."
Listen for yourself.
I thought about this song a few nights ago after dreaming about being underwater, holding my breath, and waking up short of breath. I think I might have sleep apnea. I think "Leah" might really be about sleep apnea.
Of course, Roy was briefly in the Traveling Wilburys with George Harrison.