How to make good musicians/bands bad

The Beatles

 * Have them release the bluesier version of "Helter Skelter".
 * No, not the 27-minute version either.

The Kinks/Ray and Dave Davies

 * Have Ray Davies voice a British character on PB&J Otter.

The Who

 * Have them cover the Noodle Dance from PB&J Otter.

Iron Butterfly

 * Make their one-hit wonder, "In-A-Gadda-Da-Vida", screamo-style (but that's impossible, considering how the song was released in 1968 and screamo didn't exist until 1991)

Steppenwolf

 * Have them be an acoustic-based soft rock band.

Jimi Hendrix/The Jimi Hendrix Experience

 * Have Hendrix write raps.

REO Speedwagon

 * Have the main guitar riff of "Keep on Loving You" played on an acoustic.
 * Have "Take it on the Run" be heavy metal-influenced.

Steve Miller Band

 * Have the original version of "Jet Airliner" played on the radio.
 * Have "Fly Like An Eagle" played on an acoustic guitar.
 * Same with "Take the Money and Run".

Journey

 * Have all the guitar riffs they play except the guitar solos be played clean.

Led Zeppelin

 * Add a piano to the studio version of "Stairway to Heaven" (the live version has one already).

Whitesnake

 * Have "Here I Go Again" go on for over 6 minutes.

Grand Funk Railroad

 * Have the band mix folk rock with disco for one of their albums.

Billy Idol

 * Have the guitar riffs to his song, "White Wedding", played clean.
 * Or worse, on an acoustic.