Rachel sang the tune to show her struggling boyfriend, Finn (Cory Monteith), how much she cared about him. It certainly worked! (Though, we’re not sure a marriage proposal was exactly how Rachel expected Finn to respond.)
In any case, the memorable Glee song is already a major hit on the music charts, bounding up to #1 on iTunes on the day after the show.
Just before noon on January 18, Lea tweeted, “OH MY GOD! "With Out You" is #1!!!! That's so amazing!!! #Powerofthegleeks”