Calling all Mariah fans: Mark your calendars and be sure to take part in this once-in-a-lifetime event!

With Times Square as the stage's backdrop, Mariah will perform five songs on ABC Television's Good Morning America between 8:00 and 9:00 a.m. (EST)on April 12. GMA will close down 44th Street to all vehicular traffic between 6th Avenue and Broadway, and only Mariah's hordes of fans will be able to access the performance area.