"She Let Herself Go" is a song written by Dean Dillon and Kerry Kurt Phillips, and recorded by American country music singer George Strait. It was released in September 2005 as the second single from Strait's album Somewhere Down in Texas. The song reached the top of the Billboard Hot Country Songs chart in January 2006. The song became Strait's 40th Number One single on the U.S. Billboard Hot Country Songs charts, tying the record held at the time by Conway Twitty.