Their have been numerous characters from sitcoms where they try to sing and it sounds awful try to name a few ???

Peter Brady (his voice was changing!)
Lucy Ricardo (but she still wanted to be in the show!)

Barney Fife could not sing, "not a lick" LOL. (But Don Knotts himself was a good singer.)

Grace Adler on Will and Grace

Laverne DeFazio on "Laverne & Shirley" was not the best singer in the world- but she did get to sing some songs once she found the right song for her. (There is one particular episode, I think from Season 6, that centers around this. Laverne again performs "The Look" with Lenny in that episode- which is a great, fun and funny song, by the way.) I think she did a great performance there.:) :cool:
I love Laverne & Shirley.:)

I can't believe no one's said the worst singer of them all: EDITH BUNKER!

Will Smith!!!

Not really a sitcom but I heard Lindsay Wagner warbling on a Bionic Woman episode. It was indeed cringe-worthy.

The Brady Bunch- i dont think peter could sing any better before he became a teenager and his voice changed.

Edith Bunker was a bad singer but steve urkel was a even worse singer lol.