( CNN ) -- Pop star Rihanna is adding major star power to the campaign for gay rights in Russia . The singer behind hits such as `` Disturbia '' and `` SOS '' tweeted a photo of herself wearing a hat emblazoned with P6 , short for Principle 6 . The campaign speaks out against Russia 's anti-gay propaganda law as the nation hosts the Winter Olympics . Rihanna has 34 million followers on Twitter . The photo links to her Instagram account , which has about 12 million followers . In subsequent tweets , she posted links to other articles highlighting the issue . Equality group All Out tweeted the singer back . `` Whoah . Thank you @ rihanna for standing up for # P6 and equality at the Olympics ! '' the group posted . Russia has faced criticism for its policies involving homosexuality leading up to the Olympics in Sochi . In June , its parliament passed a law that makes it illegal to tell children about gay equality . The international community has widely criticized the law as archaic and discriminatory . And last week , Russian Prime Minister Dmitry Medvedev has signed a decree banning foreign same-sex couples from adopting Russian children . The move also bans singles from countries where same-sex marriages are legal from adopting Russian children . Russian President Vladimir Putin has said Russia , unlike some other countries , does not criminalize homosexual relationships . `` We do n't outlaw anything and do n't nab anyone , '' Putin said last month . `` That 's why you can feel safe and free here , but please leave our children in peace . ''
She posts a video to her 34 million followers on Facebook . In it , she 's wearing a hat emblazoned with P6 . The song speaks out against China 's laws about homosexuality .