This is a string of two songs in it.

The main part of this song is Katy Perry's california gurls.

About 56 seconds later, the episode of Michael Jackson's classic song "Smooth Criminals" was inserted.

And obviously, this song is a late mix, of course, it is not very obvious.

After answering, I listened carefully for several times. The first 12 second of the song is another song, but this song is not sung much, so I'm sorry, but this rhythm type of 12 second is found in many songs and doesn't play much role in this song. Let's see if anyone can find it.