Having a bad day? Well this will definitely turn your frown upside down.
Kai Langer, the adorable 4-year-old who charmed Ellen and audiences worldwide last year with his too-cute-for-words Bruno Mars performances, is back at it again with an epic performance of Katy Perry's "Roar."
We don't think even Katy sings it as passionately as Kai. What do you think?