another “Ring of Fire” by a cappella group Home Free:
Jonathan Coulton doing “Baby Got Back” (Sir Mix-a-Lot cover)
Carolina Chocolate Drops doing “Hit Em Up Style” (Blu Cantrell cover)
The Bobs doing “Helter Skelter” (Beatles cover)
Not an exact cover, more of a rework of Peggy Lee’s Is That All There is? by Cristina.
Smoke on the water on traditional Japanese instruments.
White Animals-“These Boots Are Made a For Walking”
The Cuban group, Vocal Sampling does Hotel California…
Anyone remember when Pat Boone did that album of heavy metal covers?
There are also albums of Metallica and Rush songs performed by string quartets.
Strangest song I ever heard on Muzak? KISS’ “Heaven’s On Fire”.
And then there was “One Toke Over The Line” by some people on the Lawrence Welk Show. Watch it clear through to the end.
:p :smack:Or this rendition of Toto’s “Africa”, which isn’t quite as bizarre.
They also do a remake of Yes’ “Long Distance Runaround”.
Haven’t seen any references to Dread Zeppelin here, unless they’re embedded. They’re the band who did (maybe still do) Led Zeppelin songs reggae style, and the singer is an Elvis impersonator. I’ve seen them twice; the first time was one of the best concerts I’ve ever attended.
Frail and worthless mortals, turn away now, lest the power of metal consume you and make you into something greater! As the power of metal has done to these frail and worthless songs!
*Graveworm covering REM’s “Losing My Relegion”
*Rob Zombie covering Grand Funk Railroad’s “We’re An American Band”
*Blind Guardian covering the Beach Boys’ “Mister Sandman”
The great metal crusade shall spare none! Even the music of children’s movies shall be made into something worth listening to! Behold Betraying the Martyrs covering “Let it Go”!
The power of heavy metal is so undeniable that even Tori Amos is compelled to pay tribute to the indomitable SLAYER!
ETA: This isn’t a cover, but it is not a song…
Heck, anything by the California Guitar Trio. They’re on YouTube.
Here the Ukulele Orchestra Of Great Britain reveal the name of the man who won’t cop out when there’s danger all about.
Cousin Emmy playing “Turkey in the Straw” on her face
She also plays “You Are My Sunshine” on a rubber glove.
Several years after it was a hit, we played that in junior high concert band.
:o
Tori Amos did a cover of “Smells Like Teen Spirit”, and how about Aztec Camera’s remake of Van Halen’s “Jump”, recorded just a few months after the original topped the charts?
Rajput and the Sepoy Mutiny play Up, Up and Away on a badly-tuned sitar.
I’ve always loved this thing, every tortured note, and especially when the keyboard kicks in with the chorus 
::
Senor Coconut (Uwe Schmidt) y su Conjunto do a bang-up job of Riders on the Storm. Great fake Mexican accents:
And a lovely Latin-Americanized, very faithful version of **Autobahn**: Billy Mure's **Hawaiian War Chant** sounds kind of tongue-in-cheek:
How about this Blondie/Doors mashup called “Rapture Riders”? 