Britney Spears is threatening to take a Florida radio station to court over a series of billboard advertisements that used her bald-headed image next to the captions 'Certifiable', 'Shock Therapy' and 'Total Nut Jobs'. The Toxic star is less-than-impressed with WFLZ's advertising hoardings for MJ Morning Show, which her lawyer claims are "outrageous in the extreme". The three billboards feature a paparazzi photo of Spears in the days after she controversially shaved her head earlier this year (07). In a letter obtained by website TheSmokingGun.com and sent to the legal department of Clear Channel, which owns WFLZ, Spears' attorney protests the decision to link the singer's image with mental illness and for allegedly failing to remove the billboards nearly two weeks ago. The letter reads: "It was outrageous in the extreme that Clear Channel created and displayed the billboards in the first place. That Clear Channel then had the unabashed temerity to lie about their removal shocks the conscience. "We demand a complete inventory of all Clear Channel billboards containing my client's photograph... We must also insist upon documentary evidence verified under penalty of perjury to establish that all of the billboards have in fact been taken down."