Women were also key entertainers who performed at shows. Stars such as Marlene Dietrich, Judy Garland, Betty Grable and Rita Hayworth had traveled over a million miles. Yellin notes that on one tour, Hayworth visited six camps, gave thousands of autographs, and "came back from Texas with a full-fledged nervous breakdown from over-enthusiasm!" Opera singer Lily Pons, after she had performed a "serious" opera song to troops in Burma, "an applause erupted that stunned even the most seasoned performers." She later wrote in a letter, "Every woman back home wears a halo now, and those who represent her had better keep theirs on, too."