This Youtube video is Amy Winehouse and Remi Nicole jamming in the lobby at the St Lucia hotel.
Amy is playing the piano and singing, while Remi Nicole sings and dances.
The song Amy and Remi are singing is I Know Him So Well. I Know Him So Well is a song from the concept album and musical Chess by Tim Rice.
The song I Know Him So Well has been covered by artists including: Whitney Houston, Barbara Streisand, Elaine Page and Susan Boyle.
Remi Nicole Wilson, better known as Remi Nicole, is an English singer-songwriter and actress who was born and lives in North London. She is best known for her single Go Mr Sunshine, which was released in 2007.
Her debut album, My Conscience & I, was released later that year and her second, Cupid Shoot Me, on 31 August 2009.