Louis Jordan's #1 R&B hit from 1949, "Saturday Night Fish Fry", is still a well-loved classic today, but far fewer people have heard the original version, also from '49 by Eddie Williams and His Brown Buddies.
Williams was the bass player for Johnny Moore's Three Blazers and in '49 he split off to form his own group. They scored a hit with "Broken Hearted" (#2 R&B), and hoped "Saturday Night Fish Fry" would be a big follow-up. But once Jordan heard their recording, he rushed out his own version and stole their smash right out from under 'em. It's a very different version, more of a shuffle as opposed to Jordan's rousing jump blues. Dig it.
Eddie Williams and His Brown Buddies
"Saturday Night Fish Fry"
Released 1949, Supreme 1542
Remembering Eddie Williams by J.C. Marion
"Saturday Night Fish Fry" (Wikipedia)
A real Juke Joint Fish Fry (source for the pic at the top of this post)