Family troubles, scandal, weight gain ... Janet Jackson doesn't let anything stand between her and an over-sexed performance, even a nationally viewed nip slip. But lately, she's canceled a string of concerts.

The culprit? Like 28 million other Americans, Miss Jackson gets nasty migraines (vestibular migraines to be exact, a form of the headache that causes vertigo). Fortunately, her missed appearances will reportedly be rescheduled.

The headaches, which tend to affect three times as many women as men, may have an unexpected upside. New research shows that women with a history of migraines are less likely to develop breast cancer. Scientists believe there may be a hormonal link, as women with high estrogen are more likely to get breast cancer, while migraine-sufferers tend to have low levels of it.

It's a small concession for all those missed performances of "Escapade," and for some of us, huddling under blankets in a pitch-black room, trying to do yoga without puking up our Topamax.

More basic facts on migraines -- and how to treat 'em -- on AOL Health.