Mashup Mondays: Vanessa Carlton
Vanessa Carlton covers Mumford & Sons at Billboard Studios.

Vanessa Carlton is rescheduling and outright canceling some of the shows on her upcoming tour due to complications from an ectopic pregnancy.

In a post on the singer's Facebook Tuesday (Nov. 5), Carlton announced the cancellation of the first four dates of her November tour, as well as the rescheduling of three of the dates until next February, citing "intense nerve pain" from a recent surgery.

During the first week of her last tour, Carlton announced she was pregnant, but by last month, the pregnancy was diagnosed as ectopic because, according to Carlton, the embryo had settled in her fallopian tube, creating a high risk for rupture or internal bleeding. As a result, she said she was given Methotrexate, a type of mild chemotheraphy, to avoid complications, but began experiencing internal bleeding last Monday (Oct. 28), causing surgery for the removal of her fallopian tube.

Though the surgery was successful, she experienced pain in an incision, causing the cancellation of dates in Vancouver, Bellingham, Wash., Portland and Seattle. Three additional dates in Atlanta, Charlotte, N.C., and Alexandria, Va., are the rescheduled dates.

Barring further complications, Carlton's tour will resume Nov. 13 in San Francisco.

Check out the the rescheduled shows below. Tickets for those dates will go on sale Nov. 8.

Feb. 6 - Alexandria, Va. - The Birchmere
Feb. 8 - Charlotte, N.C. - Visulite Theatre
Feb. 9 - Atlanta, Ga. - Terminal West