29 March,2011 08:49 AM IST | | Agencies
Britney Spears treats fans to a free concert at the Bill Graham Civic Auditorium in San Francisco, Calif.
The 29-year-old pop princess taped a performance for Good Morning America, which will air this Tuesday.
After singing Hold It Against Me, Big Fat Bass, and Till the World Ends, Brit was given a framed proclamation stating March 29 will be Britney Spears Day in San Francisco.
