"In this April 18, 2012 photo, Irish singer Sinead O'Connor is shown during an appearance in Colone, Germany. O'Connor says she has to cancel her tour commitments for 2012 due to her bipolar disorder. The singer made the announcement Monday, April 23, in a posting on her Website. She wrote that she is ""very unwell"" and had been advised by her doctor to not hit the road after her ""very serious breakdown between December and March."" (AP Photo/dapd, Mark Keppler)"
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