Miley Cyrus feels homesick after arriving in Los Angeles for the first time to pursue her career. She takes a taxi and sees the Hollywood sign, feeling overwhelmed by the pressure and fame. However, when the taxi driver plays Jay-Z and Britney Spears songs on the radio, she feels better dancing and singing along, realizing that she will be okay. The song describes her experience of attending her first big party in Los Angeles and feeling out of place, but learning to enjoy herself and realize it's a "party in the USA."