Irish singer-songwriter Sinead O’Connor has reportedly canceled her 2012 tour on her doctor’s advice because of her bipolar disorder.

The “Never Get Old” singer worried a lot of her fans around the globe last year due to her obscene, self-immolating Twitter rants. On Monday, Sinead O’Connor announced on her website that she will cancel her 2012 tour because she is “very unwell” and had been advised by her doctor not to hit the road after her “very serious breakdown between December and March.”

“With enormous regret I must announce that I have to cancel all touring for the year as am very unwell due to bipolar disorder,” 45-year-old Sinead O’Connor wrote.

In December, the Irish singer announced that she and therapist Barry Herridge are ending their 16-year relationship. After their split, Sinead O’Connor checked into a hospital for depression in January, insisting via her website that she was “routinely misdiagnosed” with bipolar disorder when in reality she had post-traumatic stress disorder stemming from her childhood.

“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,” Sinead O’Connor continues. “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.”

The Grammy award-winning singer said she hopes to get better soon from her bipolar disorder to attend a planned Curtis Mayfield tribute at Manhattan’s Lincoln Center in July.

Sinead O’Connor is best known for the early 1990s hit cover “Nothing Compares 2 U.” Her latest album, “How About I Be Me (And You Be You)?” was released in February. The Irish singer says she had planned the 2012 tour because of the album’s release, but was “attempting to be stronger than I actually am.”