The Set of Unrelated Homonymic Songs that Rock

Ö = { all song titles x : | R(x | > 1 }

Where the function R is a function enumerating all songs with that title that totally rock, but are completely unrelated to one another.

Thus,

Ö = {
"Forever Young",
"Changes",
"One",
"Photograph",
"Push It"
}

NOTE: "It's My Life" was a close contender... but the Bon Jovi song really only has cheese factor.