Credit: Video Still

Oh, Glee. The genre-defying, boundary-breaking, fangirl-inspiring show has had its ups and downs over the years. Despite its flaws, we still love it — we always will — but sometimes it's nice to think back on Season 1, when it was all fresh and new and practically perfect, and each new musical moment seemed more inspiring than the last. So, for Flashback Friday, we decided to bring you one of our favorite Season 1 musical memories: Rachel and Finn's duet to "Faithfully."

What makes this song so special is not just the heartfelt singing, but the moment that preceded it. This was their opening number at Regionals, and after Rachel told Finn to break a leg, he burst out, "I love you." Aaaaand time to go sing!

Of course, this song has gone from gorgeous and uplifting to poignant and heartbreaking in light of Lea Michele and Cory Monteith real-life relationship and Cory's tragic passing. It doesn't make the song any less beautiful, but it does make it harder to take.

Relive the unforgettable duet here. We dare you not to cry.