You'd think a song about undies would be a little immature, right? Well, ever since 5 Seconds of Summer was able to fit an American Apparel underwear reference in their love song "She Looks So Perfect," we know that's not true. And now that Ed Sheeran's covered it, we're swooning all over the place.

Sheeran strips down the tune, relying only on acoustic guitar as he tends to do. He lifts the song into a falsetto and makes the lyrics even sweeter and lighter, as if he were placing each one gently into the air.

Take a look at Sheeran's Capital FM performance from Sunday and let us know which version you prefer: Ed's, 5SOS' or -- game-changer -- 5SOS' acoustic version.