Listen, when it comes to being THAT girl Mýa has stamped her spot and it's not up for debate. Mýa has been a special guest on Brandy and Monica's tour the 'Boy Is Mine' tour and the internet is eating it up!RELATED: Mýa Gets Real About Nor Having The Desire To Have A Husband Or Kids (WATCH)Mýa Stepped Out & Stole The Show, Period!Roomies, the 'Boy Is Mine' tour is heating up and Mýa is bringing the fire! The singer's one of the many guest performers and she's absolutely killing it.