There are many great covers of Beatles songs: these are not them.
Sean Connery, "In My Life"
On the plus side, he's not trying to sing. On the minus side, literally everything else.
Source: youtube.com
Mrs. Miller, "Yellow Submarine"
Mrs. Miller has a few unbearably shrill Beatles covers, but this one might be the worst. Tough competition!
Source: youtube.com
Xaviera Hollander, "Michelle"
If you want to listen to "The Happy Hooker" feign an orgasm while singing a Beatles song, this is the cover for you.
Source: youtube.com
Bill Cosby, "Sgt. Pepper's Lonely Hearts Club Band"
The first time I heard this I thought it was someone doing a Bill Cosby impression. If only that were the case.
Source: youtube.com