Nikki Sixx - Nikki Sixx's Girlfriend Joins Motley Crue At Michigan Show

Courtney Bingham, who has been dating the 53-year-old rocker since 2010, took to the stage at the Dte Energy Music Theater in Clarkson, Michigan on Thursday (06Sep12) during a rendition of the group's hit Girls, Girls, Girls and stripped off in honour of her 27th birthday.

Sixx subsequently praised his partner's efforts in a post on his Facebook.com page, writing, "It was... a blast for me watching Courtney get all excited to dance on stage with our background dancers for her b day (sic). She really kicked a** too. Life is good..."

The stage appearance wasn't Sixx's only treat for Bingham, who turned 27 on Wednesday (05Sep12) - he also filled the band's tour bus with silver and white balloons and presented her with a personalised birthday cake.