Nicki Minaj surprises YouTube sensations Sophia and Rosie after adorable Super Bass routine

They became a YouTube sensation after their adorable performance of Nicki Minaj's Super Bass went viral earlier this month.

And today little Sophia, eight, and her cousin Rosie, five, from Essex, England, got the surprise of their lives during an appearance on the Ellen DeGeneres Show.

The talk show host introduced the pair, who were both dressed in their now famous pink ballerina outfits and tiaras, to their idol after they performed a lively rendition of her hit song.

Sophia, who wowed the crowd with her impressive vocals, squealed with delight as the pop star emerged from backstage.

She immediately jumped into the singer's arms and threw her arms around her.

Rosie, who dances and offers support while her old cousin sings, also gave her a hug.

Ellen then gave them Nicki inspired wigs, microphones and necklaces to complete their look.

The star then joined her little fans for another rendition of the song.

The pop star said she was so impressed when she first saw the clip, which has now been viewed more than six million times.

'Within five seconds of seeing this video I was calling everyone,' the 28-year-old said.

'I was also receiving a billion emails. Everyone was like you have to see this little girl.

'She blew me away. I have a hype man and you have a hype girl.'

She added: I said, superstar.  Seriously we are watching a journey that’s about to be amazing.

She told Sophia: You are incredible. I just want you to stay in school. Music is beautiful but stay in school ok. Put your books first and singing second.'

Watch Ellen DeGeneres interview Sophia and Rosie here...

And see Nicki Minaj surprise the girls on stage here...