Low Flo Rida
Rich and Kat chatted to Jason Derulo about his forthcoming album, working with Lady Gaga and his success.
But that's not all. They even manage to swap dance moves - Rich and Kat show Jason the 'primary school shuffle' whilst Jason shows them the Jason Derulo shuffle. It's like Strictly Come Dancing had never happened! watch the video below and check out the photos in our gallery.