Mary Kate Morrissey is the latest green girl to take up residence at Broadway's Gershwin Theatre. The Wicked star joins a long line of illustrious Elphabas that came before her, including one particular Tony-winning vlogger who gave Broadway.com audiences a peek inside the Emerald City 11 years ago. Now it's Morrissey's turn to take fans behind the scenes with her own viridescent vlog, Positively Emerald. Beginning August 9, Morrissey will be our host for eight weeks, showing us the ins and outs...