Home · Celebrity Star Gazing: Solange Is Seriously Stylish at Cavalli Solange Knowles rocked a beautiful Roberto Cavalli dress while deejaying at the designer's 'Black is Never Absolute' exhibition in Las Vegas. By · Updated October 28, 2020 Solange Knowles rocked a beautiful Roberto Cavalli dress while deejaying at the designer’s ‘Black is Never Absolute’ exhibition in Las Vegas.