Motley Crue bassist Nikki Sixx and model Courtney Bingham are the latest to join the NOH8 Campaign, a charitable organization that was founded in the wake of California's passage of Proposition 8 that banned same-sex marriage. The NOH8 campaign seeks to “promote marriage, gender and human equality through education, advocacy, social media and visual protest.”

The campaign has stuck in the minds of many due to the striking photo shoots of celebrities posing with duct tape over their mouths signifying the voices being silenced by Prop 8. Celebrity photographer Adam Bouska created the campaign and has been responsible for the shots, which frequently feature the celebs posing in white t-shirts with the "NOH8" logo painted somewhere on their person.

The portrait featuring Sixx and his fiancée, Bingham, comes with a quote that states, "Courtney and I believe in freedom of choice, no matter your sex. We believe you should be able to be yourself, love who you want and not be criticized for it. We believe in LOVE!"

Slash, Gene Simmons, Paul Stanley, Mark Hoppus, Camp Freddy's Billy Morrison and more have also shot portraits for the NOH8 Campaign. For additional information on NOH8, click here.