Dance sensation Lady GaGa has grabbed her second number one in the U.K. singles charts with POKER FACE.
The U.S. pop star beat rapper Flo Rida's Right Round to the coveted top spot, while Comic Relief charity track (Barry) Islands In The Stream dropped from first to third position.
Brit girlband The Saturdays made number four with Just Can't Get Enough and country sensation Taylor Swift rounded out the top five with Love Story.
In the album charts Ronan Keating's Songs For My Mother debuted at number one, holding off a greatest hits collection by singer Annie Lennox.
U.S. rockers Kings Of Leon climbed to number three with Only By The Night.