Holly Holm was the unforgettable champ for four months. Her shocking knock out of Ronda Rousey in Melbourne at UFC 193 instantly changed the dynamics of women's mixed martial arts. The 34-year old from Albuquerque, New Mexico, put the face of the UFC into hiding, but Holm's reign as champ was short-lived when she was put to sleep by Miesha Tate's rear naked choke at UFC 196.