7 songs you probably didn't know Bruno Mars wrote for other people

Bruno Mars is writing music with Harry Styles, according to Robbie Williams, who tells Radio Times that he also asked Bruno to work with him on his recent album.

Bruno said no to Robbie but yes to Harry.

It's sad news for Rob but great news for Harry and millions of One Direction fans who are ready and waiting the next 1D lad to drop his solo material. After all, no one knows how to write a pop song quite like the Las Vegas star.

But will his songs for Harry be as good as these major tunes that he wrote for other pop stars?

Maybe you wondered why Bruno chose to cover Adele's All I Ask in the Live Lounge recently. Well, perhaps it's because he wrote the song.

He did a fine job to reinventing the track into a smooth R&B slow jam, swapping Adele's raw emotion for some slinky Mars swag.

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Once you get over how young The Vamps look in their debut video, let’s talk about how Bruno Mars wrote their first ever hit single.

We can't imagine Bruno singing this one (maybe because Brad does such a good job) but it's a 10/10 chorus that could only have come from an expert.

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Bruno Mars worked so well with Mark Ronson on Uptown Funk that the pair teamed up again on the follow-up single, Feel It, albeit behind the scenes.

It wasn't a hit, but it was still a huge, funky tune. Maybe it just needed a little more of Mr Mars on the track.

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TBH, Bruno probably could have sat back and retired after writing Forget You for Cee Lo Green, it was such a big hit.

We can't imagine anyone other than Cee Lo Green singing the track, but the sense of humour and pure sass on the song is all Bruno.

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During their time at the top, Sugababes recorded some incredible pop tunes. This wasn't one of them.

Bruno worked with the trio towards the end of their career, a dance track which sampled parts of Right Said Fred's camp classic, I'm Too Sexy.

Bruno even manages to steal the show with his "Hey sexy" vocal on the verses.

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Oddly enough, Never Close Our Eyes was never a hit in the US, but it is Adam Lambert's most successful song in the UK. Perhaps that's because we know a good slice of Bruno gold when we hear it.

The song reached No.17 in the UK charts before Queen came calling and he became the (part time) frontman for one of the biggest rock bands of all time.

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If there's one man in music who likes a party, it's Bruno Mars. If there are two, it's Bruno Mars and Flo Rida.

He co-wrote wrote this global chart-topper with a little help from 80s band Dead Or Alive which gave Flo Rida a huge hit and introduced the world to Ke$ha - who sung the chorus.