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The riff is VERY like the KISS song 'Makin Love'.
Try Black Sabbath's NIB (main riff), Iron Man (main riff), Black Sabbath (opening riff) Candlemass' Solitude (main riff, second riff) Deep Purple's Space Truckin' (main riff, chorus riff), Black Night (all) Dio's Holy Diver (opening riff) Danzig's Twist of Cain (opening riff; it's easy but fast)
Probably neither. It's an extremely common riff that's been played in a variety of different ways. There's no point in point the finger at any band who has used it.
Easy!!!! EDC (the riff) CEGE (the riff) CAAAAA AABAG (the riff) EGGGA (the riff) CEGE (the riff) CAAAAA AABAG (the riff).
Riff was the orange dinosaur.
The song used in the school of rock is Iron man. Jack black teaches the guitar riff to the class.
I Like to Riff was created in 1978.
Borkum Riff was created in 1969.
Rhythm in a Riff was created in 1947.
Riff Markowitz was born in 1938.
He based the riff of Come as You Are on their song Eighties; many would argue it's simply Eighties' riff slowed down.
The Riff Raff Element ended in 1994.