"Swish Swish" is a song by American singer Katy Perry. It features a rap from American rapper Nicki Minaj. The song is from Perry's fifth studio album, "Witness". It talks about overcoming bullying and has sounds of house music throughout it. It was released in May 2017 as a promotional single with the pre-order of "Witness", but it was released later as an official single on May 19.