Anglo-Irish pop group The Saturdays had their first number one single on the British charts on Sunday with "What About Us", a collaboration with Jamaican singer Sean Paul.
The London-based five-piece have had 11 hits in Britain since they were formed in 2007, but had never before taken the top spot.
The Official Charts Company, which compiles the weekly rundown, said their dance-pop single pushed last week's number one, "Mirrors" by Justin Timberlake, into second place.
Holding on to third place were U.S. singers Pink and Nate Ruess with their track "Just Give Me A Reason".
American singer-songwriter Bruno Mars was a non-mover at number four with "When I Was Your Man", while London band Bastille were steady at five with "Pompeii".
Timberlake's new album "The 20/20 Experience" entered the chart at number one in its first week of release, knocking David Bowie's "The Next Day" down to second place.
English indie band Suede were the second highest new entry at 10 with "Bloodsports", thir sixth studio album.