Singer k.d. lang has filed to dissolve her California domestic partnership with Jamie Price, celebrity website first reported.

The women entered the union on November 11, 2009 after a six year engagement. Lang reportedly filed for a dissolution of her partnership in Los Angeles Superior Court on December 28, 2011 after a four month separation.

Lang cited irreconcilable differences in her filing.

The couple met through their mutual Buddhist teacher in 2003, according to New York magazine.

The 50-year-old Canadian pop and country music singer-songwriter came out lesbian during a 1992 interview with gay glossy The Advocate. She went on to become an advocate of gay rights, including HIV/AIDS awareness and funding.

There is a brief mention of Price in a 2008 The Sunday Times story.

“She is occasionally snapped eating out at Mr. Chow in Beverly Hills, but when she isn't working, Lang is mostly a homebody, living quietly with a girlfriend she refers to as 'my wife' – they're not legally married – and her two dogs,” the paper wrote.

Lang also said that her five-year-affair with actress-singer Leisha Hailey (The L Word) was the inspiration behind the album Invincible Summer. “[W]e had a joyous time high up there in terms of energy level, and I think the album reflects that,” Lang said.

(Related: Justin Bieber is hot because he looks like a lesbian, K.D. Lang says.)