Nikki was a member of the band Sister along with Lizzie Grey. Sister was a successful heavy metal band that was active in the late 1970s and early 1980s. The band released three studio albums and toured extensively. Nikki was a talented guitarist and vocalist, and she was a key member of the band's success.
The Rockin' Life of Nikki Sixx: An Engaging English Quiz on the Rockstar Legend