Complex sentence: "Fancy" was described as an electro-hop song; it was written by Azalea and XCX and composed by production team the Invisible Men, who also produced it, alongside The Arcade.
Split into simpler sentences: Fancy was described as an electro-hop song. It was written by Azalea and XCX, and composed and produced by production team the Invisible Men, alongside additional producers The Arcade.