RB has two "Somebody to Love" - Jefferson Airplane and Queen.
A quick scan of Wiki DLC (+ some memory from RBN + exports) shows two songs each named "Control", "Burn", "Down", "Fire", "Gone", "Forever", "Pain", "Photograph", "Pressure", "Supersonic", "Monster", "Walk", "Young"... two named "Days Go By", two named "It's My Life", there's a "DOA" and a "D.O.A.", counting AC/DC there's two "Jailbreak (Live)" (yes, both live).
Outside RB-world, Wiki lists 13 distinct songs named "Since You've Been Gone" - including Fine Young Cannibals, Weird Al Yankovic, Bobby Darin, Theory of a Deadman, The Four Tops, Aretha Franklin, Powderfinger... and that's not counting Russ Ballard's "Since You Been Gone" (famously covered by Rainbow), nor Kelly Clarkson's "Since U Been Gone".











