Katy Perry was the guest curator for January on Madonna’s Art for Freedom platform and on Friday, her last day on the job, the “Unconditional” singer posted a public-service announcement from the group (We Are) #GayPropaganda, which is shining a light on the plight of Russia’s LGBT community.

(We Are) #GayPropaganda is encouraging Twitter and Instagram users to redefine “gay propaganda” by adding the hash-tag #GayPropaganda to photos, artwork and storytelling.

Madonna launched Art For Freedom in conjunction with Vice magazine as a “a global initiative encouraging creative expression” to raise awareness around human-rights violations. “I am so fortunate to have the freedom to express myself through music,” said Perry. “I believe that 2014 can be a year of great social change. Together we can all stand up for human rights. Join the conversation, and let your art be your voice.”

Find out more about (We Are) #GayPropaganda on their Twitter page @GayPropaganda and Facebook page.