michelle-obama

Find out who Michelle Obama and James Corden's surprise guest on Carpool Karaoke was...

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Michelle Obama and James Corden had the audience in stitches as they drove around the White House for Carpool Karaoke. But the pair upped the fun factor even more when Missy Elliott made a surprise appearance.

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The rapper joined the US First Lady and the British presenter in the back seat of the car as they rocked out to Michelle's new song This is For My Girls.

The girl power anthem was released in collaboration with Michelle's initiative, Let Girls Learn, and features vocals from Missy, Kelly Clarkson, Lea Michele and Kelly Rowland among others.

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Michelle Obama and James Corden were joined by Missy Elliott

Michelle, Missy and James sang along to the inspirational track, then busted some serious moves as the rapper's hit Get Ur Freak On played.

The First Lady and mum-of-two explained why she launched her initiative, which aims to provide the most vulnerable girls with an education.

"So much can be corrected in the world if girls were educated and had power over their lives," said Michelle. "My message to kids here is don't take your education for granted because there are girls around the world who would die to get the education that we have. They would move mountains."

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The First Lady revealed that her Secret Service code name is Renaissance

The conversation took a lighter tone when James pried into the workings of the Secret Service, and asked Michelle what her Secret Service code name is.

"We're all Rs," she revealed. "I'm Renaissance. Barack is Renegade. You're assigned a letter in the alphabet so you don't get to choose your letter. For me they just came up with it and said, 'Do you like it?' And I said. 'Yeah, whatever.'"

James came up with his own code name, joking: "I was thinking like... Papa Smurf. Papa Smurf and Renaissance are in the car. Or Tiramisu. Tiramisu and Renaissance are in the car."

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The duo sang along to Beyoncé's Single Ladies

Asked if she would miss the 24-hour room service at the White House after Barack's term comes to an end and the family move out, Michelle said: "That's nice but the freedom that we'll get in exchange for the privileges and the luxuries, seven and a half years luxuriating that's enough. I can make my own grilled cheese sandwich at 3am. I can make a mean grilled cheese sandwich."

During the ride Michelle, 52, and James, 37, also busted some moves to Beyoncé's Single Ladies.

After their particularly energetic performance, Michelle joked: "We just dropped the mic. We were making honey in the hive. We were making honey... to put in our lemonade!"

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