Miley Cyrus in her Party In The USA music videoSince its release in 2009, Party In The USA has wound up becoming one of Miley Cyrus’ signature songs.If you’re a fan of Miley – or pop music in general – you might already be aware that the song was actually written by another big-name star from that era, Jessie J.But what you might not know is that the Domino singer originally wrote Party In The USA with the intention of singing it herself, before it became a hit for the former Disney star.And because of Jessie being a Brit, her version of Party In The USA had a few different lyrics to the version we know and love today.