For example, “The Trees” by Rush, as sung by Daffy Duck: “There ith trouble, in the foretht…” Or any song by Styx (but especially Lorelai or Come Sail Away) sung by Eric Cartman.
Mine was actually done. Walking in Memphis as covered by Cher.
The Mercy Seat, done by Madonna. I’ve no idea what she’d do with it, but it’s guaranteed to miss the point entirely.
Fairytale of New York - Ewan McGregor & Nicole Kidman (if their attempts in Moulin Rouge weren’t bad enough).
Paranoid Android by Oasis.
“Music of the Night” from Phantom of the Opera sung by Fred Schneider of the B-52s.
You do know that whenever Cartman hears the start of Come Sail Away, he has to finish the entire song, right? It makes for much hilarity in one of the very early episodes.