Today I learned that Steven Tyler, the singer of Aerosmith, once heard on the radio an old song of the band ("You See Me Crying"). Tyler suffered from partial memory loss due to years of massive drug use, was enthusiastic about the song, and suggested that the band record a cover.
Joe Perry, a guitarist in the band, told him: "It's ours, fuckhead."
Source: https://en.wikipedia.org/wiki/Toys_in_the_Attic_(album)#Recording_and_composition