Aussie singer Gabriella Cilmi has slagged off her rival for the Brit Award for Best International Female.The trophy was awarded to Katy Perry who won out over Gabriella, Beyoncé, Pink and Santogold. Grabriella told a British newspaper, “Katy is okay but I don’t think she should have won. Beyoncé is amazing.” The singer also poured scorn on American musician Lady GaGa, claiming that she “needs to put some clothes on”.