Jessie J: 'Party in the USA' by Miley Cyrus Jessie J, who is notably not from the USA, famously said that the royalties.
Ryan Tedder: 'Halo' by Beyoncé This track was such a massive success and a defining hit for Queen Bey.
SZA: 'Feelin Myself' by Nicki Minaj and Beyoncé Producer Hit-boy revealed SZA was responsible for writing.
Pharrell: 'Hot In Herre' by Nelly Nelly revealed that he'd felt unsatisfied with the final cut of his album 'Nellyville.
Kesha: 'Till the World Ends' by Britney Spears Kesha has said that this song “was written specifically for Britney.
Taylor Swift: 'You'll Always Find Your Way Back Home' by Miley Cyrus Swift is another artist who has a legacy of her own but continues.
John Legend and Kanye West: 'I Want You' by Janet Jackson These two music geniuses have made names.
Ed Sheeran: 'Love Yourself' by Justin Bieber Sheeran worked with Bieber to write this track. He also penned One Direction.
Katy Perry: 'I Do Not Hook Up' by Kelly Clarkson Katy Perry is another pop star who has co-written a few songs.
Bruno Mars: 'Forget You' by CeeLo Green Bruno Mars started writing this song with his Smeezingtons production partner Philip Lawrence.
Lady Gaga: 'Elevator' by The Pussycat Dolls Before cranking out hit after hit for herself, Lady Gaga penned hits.
Harry Styles: 'Just a Little Bit of Your Heart' by Ariana Grande Grande herself told MTV she was in the studio recording her album 'My Everything' in 2014.
Mike Posner: 'Don't Tell Me You Love Me' by Big Sean The 'Cooler Than Me' singer has written for many artists, including co-writing.