Today's best tweets vary greatly from sad messages to silly, lighthearted posts. First, Chris Brown and UK native Jessie J took to their Twitter accounts to express their grief over the riots in London and the surrounding areas in the UK. As for the less serious tweets, Lea Michele tweeted a picture of herself dressed as her 'Glee' character Rachel Berry, Sara Bareilles shared her love for comic Mike Birbiglia, and Rick Ross assured us his "Everyday I'm hustlin'" mantra still lives on. See what your favorite stars were chirping about today.