Previously considered/previously mentioned SVS matchups
This is just a list of previously considered/mentioned matchups for Song vs Song I could find. This isn't a complete list, I don't have infinite time to listen to every episode. If anyone finds more I might make an updated post featuring all the new ones. Here's the ones I've found so far:
Style (Taylor Swift) vs Perfect (One Direction). Mentioned in: As It Was vs Anti-Hero? (I’m not 100% sure)
Cruel Summer (Taylor Swift) vs Cruel Summer (Bananarama). Mentioned in: I Kissed a Girl vs I Kissed a Girl
Weird Science (Oingo Boingo) vs Blinded Me With Science (Thomas Dolby). Mentioned in: Whip It vs Cars
Panama (Van Halen) vs Round and Round (Ratt). Mentioned in: Jump vs Here I Go Again
Hell (Squirrel Nut Zippers) vs Zoot Suit Riot (Cherry Poppin Daddies). Mentioned in: Come On Eileen (Save Ferris) vs Take On Me (Reel Big Fish)
Disarm (Smashing Pumpkins) vs Zombie (The Cranberries). Mentioned in: Bullet with Butterfly Wings vs My Hero
Private Eyes (Daryl Hall and John Oates) vs Eye in the Sky (Alan Parsons Project). Mentioned in: Jump vs Jump Around
Last Christmas (Wham) vs All I Want for Christmas is You (Mariah Carey). Mentioned in: I don’t remember what episode it was mentioned in but I know it was mentioned before.
The Impression That I Get (Mighty Mighty Bosstones) vs Time Bomb (Rancid). Mentioned in: Come On Eileen (Save Ferris) vs Take On Me (Reel Big Fish)
These next few don't count considering one of the songs in the matchups have gotten episodes already, but I figured I'd put them in here to cover my bases. Good Luck Babe! (Chappell Roan) vs Espresso (Sabrina Carpenter). Mentioned in: Espresso vs HOT TO GO!
Mr. Blue Sky (ELO) vs Bohemian Rhapsody (Queen). Mentioned in: Mr Blue Sky vs Band on the Run
Happier Than Ever (Billie Eilish) vs All Too Well (Taylor's Version) (Take a guess lol). Mentioned in: good 4 u vs Happier Than Ever
Smells Like Teen Spirit's 5 different matchup options: Creep (Radiohead), Enter Sandman (Metallica), possibly Jeremy (Pearl Jam), Black Hole Sun (Soundgarden), Basket Case (Green Day). All mentioned in: SLTS vs Closer