The lads knocked off Oliver Cheatham and Room 5's Make Luv which sat at the top for four weeks.
Even Madonna couldn't shift that single!
But Busted aren't the only new faces at the top this week.
So Solid's Lisa Maffia has made a great start to her solo career, slipping into the number two spot with All Over.
She just beat David Sneddon whose second single, Don't Let Go, hurried into third place.
Eight at eight