Aww! This is adorable!
We've seen how music has a strong effect on babies before, and this is another too-cute instance!
Six-month-old Rosie wasn't having a great day, but Taylor Swift made it all okay!
The adorable tot was balling her eyes out until Blank Space came on! And Swifty herself was quick to acknowledge the cuteness, tweeting:
"THIS IS THE BEST THING I HAVE EVER SEEN"
But wait until you see what happened when the music stopped! LOLz!
Ch-ch-check it out (below)!