"Somethin' Bad" is a song recorded as a duet by American country music artists Miranda Lambert and Carrie Underwood. The song was written by Chris DeStefano, Brett James and Priscilla Renea. It was released as the second single from Lambert's fifth studio album "Platinum" in advance of the album's release two weeks later. The song premiered at the 2014 "Billboard" Music Awards on May 18, 2014, and was released for sale the next day.