fun. have climbed up to this week's number one with their international smash 'We Are Young'.
The track - featuring Janelle Monáe - finally topped the singles chart after seven weeks inside the top 40. It has now sold 431,000 copies to date.
The Wanted land at number two with 'Chasing the Sun', narrowly losing out by just over 3,000 copies after they led the pack earlier in the week.
Carly Rae Jepsen's 'Call Me Maybe' is a non-mover at three after nine weeks around, while Rita Ora slips three from last week's number one to four with 'R.I.P'. Alex Clare falls one to five with 'Too Close'.
Paloma Faith's new single 'Picking Up the Pieces' enters at seven ahead of new album Fall To Grace, which is released tomorrow.
Jennifer Lopez lands at 11 with 'Dance Again', a collaboration with Pitbull, while the rapper's Men in Black III theme 'Back in Time' also enters at 23.