Her new album has been earning some of the best reviews of her career, but Sinead O'Connor won't be staying on the road to help promote it -- citing health concerns related to her bipolar disorder, she's been forced to cancel all of her remaining tour dates for the year.

"With enormous regret I must announce that I have to cancel all touring for the year as am very unwell due to bipolar disorder," wrote O'Connor in a statement. "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."

Continued O'Connor, "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. While touring will be cancelled I do hope and plan to appear at the Curtis Mayfield tribute in The Lincoln Centre in July."

O'Connor's struggles made headlines last year when she embarked on a brief marriage, followed by a series of increasingly disconcerting tweets and a public admission that she'd overdosed on pills in a suicide attempt. Diffuser.fm hopes she's able to get the help she needs in this difficult time, and emerges stronger and healthier on the other side.