"Party in the U.S.A." is a song recorded by American singer Miley Cyrus for her first extended play (EP) The Time of Our Lives (2009).
It was released on August 4, 2009, by Hollywood Records as the lead single from the project. The song was written and produced by Dr. Luke, with additional songwriting provided by Jessie J and Claude Kelly.
"Party in the U.S.A." was originally intended for Jessie J, but after deciding it was not edgy enough for her, they passed it to Cyrus and adjusted the lyrics to fit her persona.
Not completely identifying with "Party in the U.S.A.", Cyrus chose it for The Time of Our Lives partially due to a need for tracks. It is a pop song, with lyrics reflecting her relocating from Nashville, Tennessee, to Hollywood, California. This is one of four collaborations between Cyrus and Dr. Luke, with the EP title track "The Time of Our Lives", will.i.am's "Fall Down" and "Wrecking Ball" following in 2013.