We Bet You Had No Clue Bruno Mars Wrote These Songs

This track was penned by a handful of songwriters, including Mars, Seal, and Pharrell.

Yep, Mars even wrote a song for Adele.

This anthem was originally used as the theme song for NBC's Countdown to Vancouver Olympics campaign and then continued to be used during NBC's Olympic broadcasts.

The music video for this song features a young Hailee Steinfeld.

Not only did Mars write this song, but he even plays the guitar on it.

Mars cowrote the hit song for the British pop rock band The Vamps in 2013.

Mars also had a hand in this monster hit.

Mars also wrote "Better" from the pop star's previous V album.

Mars teamed up with The Jackie Boyz and Garibay for this jam off of Palmer's second mixtape in 2011.

Mars and Jibbs definitely gave us something to ride to with this banger.

In addition to "Hot Mess," Mars also wrote "Living in the Sky With Diamonds" for the band's 2009 album before making it big.

Mars was responsible for cowriting this hit for Goodie Mob's fifth studio album, Age Against the Machine.

This is arguably Flo Rida's most popular song, and according to Philip Lawrence (Mars's former creative partner in the Smeezingtons), the hook for the song was written while they were driving. It is also featured in the end credits of The Hangover.

This song was featured on Burke's debut album, Overcome, which was released a year after she won The X Factor UK.

This dance number features the chorus of Right Said Fred's "I'm Too Sexy," and was produced by Mars and Phillip Lawrence.

Remember this jam? Mars wrote this one, too.

Mars produced this track for the fellow Filipino artist, and he told a reporter, "It's a love song. It says, 'We have to stop the madness before our love explodes.'"

Mars finally achieved his dream of working with Keys when he cowrote this song for her 2012 Girl on Fire album.

This song could have been a part of Mars's debut album, but Fiona released it instead on her 2009 The Bridge album.

This song was Mishon's first single since his transition from actor to singer in 2009.

The song comes from Kingston's second studio album, which shares the same name.

No surprise here, this gem has Mars's name all over it.

Green previously revealed that "when Bruno first sung 'F*ck You' to me, they were still a bit indecisive on whether or not it could work at all." Thankfully, they recorded it and it was a hit.

Mars teamed up with the Far East Movement to write this song for the group's 2009Animal record.

A remixed version of this track was chosen as the official Coca Cola song for its FIFA 2010 World Cup program. "I had a lot of fun working with K'naan on 'Wavin' Flag.' That was a beautiful experience because we got to put in lots of African percussion. We rented a big ol' studio and a bunch of African drums that we kept layering over and over," Mars told Spin magazine.

This track was released as an iTunes-exclusive single in anticipation of Justin's debut album, My World.

Mars contributed this song to Posner's debut album, 31 Minutes to Takeoff.

Mars originally wrote this song for himself but ended up handing it off to Lambert.

This song was originally written for Nina Sky, who recorded it for their second album, but the writers ended up giving it to Shontelle when Nina Sky's record was pushed back.

This song was featured in the Sept. 10, 2010 episode of the Disney's The Suite Life on Deck, which Kingston also guest-starred in.