Back in the days when Miley was still Hannah Montana, some people had a problem with her being too childlike in her songs.
Miley always was more an imagery than a musician. That for the public.
Miley has talent and she has often proved.
She also did this on this track.
"Party in the USA" is an uptempo pop song that delivers party mood in a clean way.
It may not be the best a song can get, but it's not bad either.
Considering Miley wasn't much of a mind of its own those days, the song is surprisingly groovy, even though it isn't that much of an earworm, but still enjoyable.
Since Miley was still part of Disney's holllywood clique, the song is all clean and has nothing to worry about.