Nikki Sixx (born Frank Carlton Serafino Feranna Jr.; December 11, 1958) is an American musician, songwriter, record producer, and radio personality, best known as the co-founder, bassist, primary songwriter, and only constant member of the heavy metal band Mötley Crüe. Prior to forming Mötley Crüe, Sixx was a member of Sister before going on to form London with his Sister bandmate Lizzie Grey. In 2000, he formed side project group 58 with Dave Darling, Steve Gibb and Bucket Baker, issuing one album, Diet for a New America.
https://en.wikipedia.org/wiki/Nikki_Sixx