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21 Songs You Won't Believe Were Originally Written For Other People
Many stars get their start by songwriting for already-famous singers. Jessie J actually penned Miley Cyrus' 'Party In The USA'. But when she wrote 'Do It Like A Dude' and sent to to Def Jam for Rihanna, they sent it back, saying it was so good she should record it herself, which Jessie did. The song put Jessie on the map.