Clad in their trademark princess clothes (complete with tiaras and fluffy wands), the pair interviewed celebrities as they went down the carpet. And by "interviewed" we mean adorably shrieked and occasionally sang "Super Bass" to them. Most of the time the celebs were more excited to see them than the other way around -- and most recognized the girls from their YouTube video or their first "Ellen" appearance.
The best encounter: Watching the girls meet Katy Perry, kiss her on the cheek, and then sing "Firework."
Don't take our word for it, watch the segment and see the cuteness for yourself!
Photo/Video credit: The Ellen Show