From the 1979 album The Wall comes what I (and many others) consider the 2nd greatest song threesome ever recorded (Stevie Wright's Evie being #1). It's no secret that it's also one of the most covered as well. Another Brick in the Wall meets YouTube.
Calligop
GibsonLP1226
Tynngrot
Craigrose007
Rkreisig
Aarandiia (vocal solo)
Lucacolombo1983