Two members of Russian punk group Pussy Riot have lost their bid for freedom after a court upheld their convictions on hooliganism charges. Rockers Maria Alekhina and Nadezhda Tolokonnikova are both behind bars serving two-year prison sentences for performing a protest song against Russian President Vladimir Putin at a church in Moscow last year (12). Their bandmate Yekaterina Samutsevich was released when her conviction was commuted in October (12), but Alekhina and Tolokonnikova have lost their bid for freedom after taking their appeal to Moscow's highest court. The application was denied on Wednesday (29May13), according to the Associated Press, but a lawyer for the stars has vowed not to give up the fight to free the women. Madonna and Sir Paul McCartney are among the stars who have voiced their support for Pussy Riot and urged Russian authorities to release them.