Watch grown-up Sophia Grace and Rosie return to perform the Nicki Minaj hit that made them viral sensations in their final appearance on 'The Ellen DeGeneres Show'

• Sophia Grace and Rosie made their final appearance on "The Ellen Degeneres Show" Thursday.

• They sang "Super Bass," the Nicki Minaj song that made them viral sensations.

• The teenagers, who are pursuing music careers, recalled their most memorable celebrity encounters.

Cousins Sophia Grace Brownlee and Rosie McClelland were just 9 and five years old respectively when a video of them singing Nicki Minaj's hit 2010 song "Super Bass" in princess costumes went viral and caught the attention of talk show host Ellen DeGeneres back in 2011.

The comedian couldn't resist having them on her show that year and turned them into superstars in their own right, sending them to red carpets to meet and interview stars like Taylor Swift, Katy Perry, and of course Minaj.

In their final appearance on "The Ellen DeGeneres" show on Thursday, Brownlee and McClelland sang "Super Bass" one last time for DeGeneres using princess wands as microphones. Or, as Brownlee called them, "our original props."

McClelland and Brownlee are now 15 and 19 years old and told DeGeneres they are focusing on their individual music careers now.

Though nearly a decade has passed since they first captured the world's heart, they still got excited when discussing their favorite memories from red carpets with DeGeneres.

McClelland said her favorite memory was meeting Justin Bieber, and specificallly "the moment when he kissed me on the cheek at the Kids' Choice Awards."

"Obviously at that time I was like 'Ew, a boy. He's kissing me on the cheek. And now I'm like, 'Oh my god, I'd let Justin Bieber kiss me on the cheek again," McClelland continued.

Brownlee got excited seeing an old picture of herself with Drake and reminisced about the moment she met Minaj.

She remembered that when the doors opened and Minaj surprised them on DeGeneres' show, "I literally looked in every single direction but the one that she was coming out of. And then when I finally saw her it was just chaos."

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