Stone Sour's sixth album Hydrograd, which was also the first album to feature Christian Martucci and Johny Chow, was released worldwide on June 30, 2017 from which record label?
Stone Sour discography:  Hydrograd is the first album to feature Christian Martucci and Johny Chow since each joining the band in 2014 and 2012, respectively.
i don't know