Swedish pop stars Abba have surpassed The Beatles to score Britain's second biggest selling album of all time. Gold: Greatest Hits by ABBA and the Fab Four's 1967 classic Sgt. Pepper's Lonely Hearts Club Band have both sold 5.1 million copies in the U.K., but the Dancing Queen hitmakers have pulled ahead in the tight race by shifting another 15,000 units of their 1992 collection. Queen's 1981 Greatest Hits release still holds the top spot, according to new data released by the Official Charts Company. ABBA singer Bjorn Ulvaeus says, "It feels unreal outselling the greatest record ever." Adele's 21 and (What's The Story) Morning Glory? by Oasis round out the top five.