St. Louis (KSDK) -- Lady Gaga performed at Scottrade Saturday night as part of the "Monsterball" tour.
Gaga fans were greeted by protesters who say she's immoral and pro homosexuality.
Her supporters say she stands for diversity and love.
Many of them showed up carrying signs as well.
Lady Gaga posted a message on her twitter account, telling her St. Louis fans to ignore the protesters.