John "Jaycee" Cuijpers is a Dutch vocalist with over three decades in melodic hard rock and heavy metal. He joined British NWOBHM band Praying Mantis in 2013 and has appeared as a guest singer on four Ayreon albums by Arjen Lucassen, including the live event Ayreon Universe. Since 2023 he has fronted the Dutch six-piece Tiffany Kills, whose debut album World On Fire came out in June 2025.
Tiffany Kills released their debut album World On Fire on June 27, 2025, a ten-track hard rock album via CTM ChrisTones Music.
Tiffany Kills, the six-member Dutch band with Cuijpers as one of the two frontmen, was compared in reviews to the British Cats in Space.
Cuijpers sang multiple songs on Star One's album Revel in Time by Arjen Lucassen, including the song 'Beyond the Edge of it All'.
Praying Mantis released the studio album Katharsis in January 2022, the second album with Cuijpers as singer.
