We know you're probably thinking, "There's no way a YouTube video is going to make me cry." But seriously, get out your tissues: Because 10-month-old Mary Lynn Leroux's reaction to her mom singing is heartbreakingly adorable.
"Mommy's going to sing a song," Amanda Leroux coos to a giggling Mary Lynn at the beginning of the video. "You want mommy to sing a song, honey? Let me know how you feel about the song."
Amanda launches into Rod Stewart's "My Heart Can't Tell You No"...
And Mary Lynn loves it so much that she's literally moved to tears.