But the rain in San Francisco has prompted organisers to rethink their plans and move the concert to the nearby Bill Graham Civic Auditorium.
A statement from the ABC network reads, "Due to the inclement weather forecast for this Sunday in San Francisco, Good Morning America's exclusive Britney Spears performance will be moved indoors to the Bill Graham Civic Auditorium to protect the safety of the performers, crew and fans."
The gig, which will be broadcast next Tuesday (29Mar11), is free but fans have to apply for tickets to gain entry.
Two DJs at a local San Francisco radio station were given VIP passes to the event, but they chose to auction them off online to raise money for aid efforts in Japan. The two tickets raised $1,136 for The Salvation Army.