Baby In Car Seat, Watch What Happens When She Hears ‘Dark Horse’ By Katy Perry [CUTEST VIDEO AWARD]

Picture it...upset baby in car seat, but when 'Dark Horse' by Katy Perry comes on becomes the cutest, happiest baby on the planet.

You are about to watch the CUTEST WEB VIDEO ever.  One mom has found the key to making her baby go from a bad mood to superior happiness in one note.

This video comes to us on the heels of news about Katy Perry getting back with John Mayer.  I wonder if Katy's seen this adorable video?