The Pistol Annies' second album, Annie Up, will be released May 7, the trio announced Tuesday (March 12). It follows their critically-acclaimed Hell on Heels which debuted in August 2011. Tracks on the new album include "Unhappily Married" and the project's first single, "Hush, Hush," which was shipped to country radio stations this week. The Pistol Annies feature Miranda Lambert, Ashley Monroe and Angaleena Presley. "We laid it on the line with Hell on Heels, and we wanted to bring it again on this album," Lambert said. Monroe, who last week released her solo album Like a Rose, added "We put all our musical chips on the table, so we thought Annie Up was a good title."