Murs secured the fourth number one single of his career as his Flo Rida-assisted track Troublemaker shifted more than 120,000 copies, beating the girls into second.
Londonderry singer Nadine and her band made it 16 top five hits with charity single Something New, raising money for Children In Need, while boyband One Direction dropped two places to number three with Little Things, according to the Official Charts Company.
Rihanna's Unapologetic entered the album chart at number one — her fourth number one album.
She displaced One Direction, whose Take Me Home slipped a place to number two, with DNA by Little Mix at number three.
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