They're back and better than ever! Sophia Grace & Rosie crashed Ellen's monologue. Catch this awesome performance of the Macklemore and Ryan Lewis' hit, "Thrift Shop," right here!

It's every girl's dream... Justin Bieber comes to your お茶, 紅茶 party! See what these precocious girls had to say to the biggest pop 星, つ星 on the planet, right here.

The dynamic duo were in rare form on the red carpet, greeting stars like Nicki Minaj and P!nk, and 歌う to Alicia Keys!

Who better for Ellen to send to the Billboard 音楽 Awards than the adorable Sophia Grace and Rosie? Check out their interactions with music's biggest stars here