Pistol Annies

Pistol Annies is an American country music supergroup composed of Miranda Lambert, Ashley Monroe, and Angaleena Presley. The trio, formed by Lambert, gave its debut performance on April 4, 2011 during the Academy of Country Music's Girls' Night Out: Superstar Women of Country special aired on CBS.
The trio released its debut album, Hell on Heels on August 23, 2011 via Columbia Records Nashville. Its title track has also been released as both a single and a music video which began airing on Great American Country in July. - Wikipedia