Sinead O'Connor's comeback has been put on hold after cancelling her 2012 tour following advice from doctors. O'Connor also has claimed to be finished with the music business, according to the Irish Independent.

A 12 date North American tour in support of her critically acclaimed new album How About I Be Me (And You Be You?) was among the cancelled dates.

The following appeared on O'Connor's website: "With enormous regret I must announce that I have to cancel all touring for the year as I am very unwell due to bipolar disorder. As you all know I had a very serious breakdown between December and March and I had been advised by my doctor not to go on tour but didn't want to 'fail' or let anyone down as the tour was already booked to coincide with album release. So very stupidly I ignored his advice to my great detriment, attempting to be stronger than I actually am. I apologise sincerely for any difficulties this may cause".

Her website is now offline.

O'Connor's official Twitter account, also now offline, displayed the following last night: "Asking about jobs as music biz is very bad for Sinead. Any one have a job for a very clever woman with massive heart and courage, who adores people and has to escape music business as is very bad for her? Too much and too many long times away from home. All bad triggers for a woman with a mental illness. Can anyone come and take me home from Munich?"