Hipgnosis has acquired 100% of Bob Rock’s producer rights for Metallica’s Metallica album and Michael Bublé’s Call Me Irresponsible, Crazy Love, Christmas and To Be Loved
Vallance has also written songs for artists including Bonnie Raitt, Aerosmith, Carly Simon, Rod Stewart, Roger Daltrey, Tina Turner, Alice Cooper, Ozzy Osbourne, Europe, Kiss and others