Britney Spears has been added to the Summerfest 2011 lineup! Britney will headline the Marcus Amphitheater on Saturday, July 9th. Ticket King Milwaukee will have Britney Spears Summerfest tickets available for this July 9th show. Britney’s Summerfest show is a part of her Femme Fatale tour which also features Nicki Minaj. Nicki Minaj’s debut album, Pink Friday, went platinum just a month after it was released. Britney Spears sprung onto the pop music scene in 1999 when she released her first album, …Baby One More Time. Since then, she has sold over 100 million albums. Britney Spears and Nicki Minaj are an exciting addition to the already dazzling Summerfest 2011 lineup. You won’t want to miss Britney Spears in action!