"TAYLOR SWIFT - ALL OF THE GIRLS YOU LOVED BEFORE"

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Taylor Swift delivered four gifts to fans on the eve of her first show on The Eras tour, dropping four new songs: three Taylor's Versions of previously released tracks and a never-before-heard one, “All of the Girls You Loved Before,” a vault track from her Lover album.

The title seems to be a riff off of the famous YA book and Netflix film series To All the Boys I've Loved Before; the screen adaptation first came out in 2018 when Swift was making Lover.

source: Taylor Swift's ‘All of the Girls You Loved Before’ Lyrics Seem to Address Joe Alwyn's Romantic Past (yahoo.com)