My best joke for Elvis Week is actually a true story. 1995 in Raleigh, North Carolina. A displaced New Yorker did weekends on the local Oldies FM station to amuse herself while attending university.
She was running out of ways to introduce Elvis during an Elvis Weekend, yes, every song was an Elvis song. So, she made the mistake of saying "And here's Michael Jackson's father-in-law".
The phones immediately lit up with male callers yelling racial epithets.