Nikki Sixx once told Bob Rock he thought someone “replaced” his bass parts on early Mötley Crüe albums

Nikki Sixx onstage with Mötley Crüe
(Image credit: Anthony Devlin / Stringer / Getty)

UPDATED 5/30/23: Bob Rock has issued a statement clarifying his comments about Nikki Sixx’s bass contributions on the first four Mötley Crüe albums, saying his comments were misconstrued and “at no time did I ever actually think Nikki didn’t play bass on Mötley Crüe’s records.” He also notes, “Nikki Sixx is one of the most talented players, lyricists and songwriters I’ve ever had the pleasure of working with.” 

In a recent interview, Bob Rock recalls a conversation in which Mötley Crüe bassist Nikki Sixx allegedly told him he suspected someone had replaced his parts on the band’s first four albums, including Shout at the Devil and Girls, Girls, Girls.

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Matt Parker
Features Editor,

Matt is Features Editor for Before that he spent 10 years as a freelance music journalist, interviewing artists for the likes of Total Guitar, Guitarist, Guitar World, MusicRadar,, DJ Mag and Electronic Sound. In 2020, he launched, which aims to share the ideas that make creative lifestyles more sustainable. He plays guitar, but should not be allowed near your delay pedals.