Christina Aguilera's new LP BACK TO BASICS has shot straight to the top of the UK album chart. The disc is Aguilera's third release, but it's the first time she has topped the British charts. It knocks James Morrison's Undiscovered to number two, with Snow Patrol at three, Orson four and The Kooks five. Shakira has made it four weeks in a row at the top of the singles chart with HIPS DON'T LIE. Chamillionaire is number two with RIDIN', DAVID GUETTA VS THE EGG is three with LOVE DON'T LET ME GO (WALKING AWAY); Arctic Monkeys are four and CASCADA five.