Britney Spears

FILE - In this Dec. 2, 2008 file photo, singer Britney Spears performs on ABC's 'Good Morning America' show at the Big Apple Circus in New York. Britney Spears' 'Circus' won't be coming to Warsaw. The singer, whose hits include '...Baby One More Time' and 'I'm a Slave 4 U,' has been playing a series of shows this summer in Europe, including in Britain, France and Sweden. The July 24 2009 show in Warsaw was canceled because of a contractual dispute that could not be resolved, a statement released by her publicist said Wednesday July 15 2009.