'Ellen' sends Sophia Grace and Rosie to the Grammys

In case you live under a rock, Sophia Grace Brownlee (the brunette) and younger cousin Rosie (blonde) are these YouTube video sensations after the video of them singing Nicki Minaj's "Super Bass" went viral.

Ellen DeGeneres had them on her show back in October, where they bopped around and were generally adorable, including their complete freak out when they got to meet Nicki Minaj herself.

Ellen subsequently had them on her show again, after sending them to cover the American Music Awards' red carpet.

And now they are back! Thursday's show (Feb. 9) features these two pint-sized cuties performing Keri Hilson's "Turn My Swag On" and then being surprised with tickets to the Grammy Awards, airing live this Sunday (Feb. 12) on CBS.