Speer began singing with the group at age 3, and eventually became the singing group's pianist. Along with her parents, she performed with her brothers, Jackson Brock and Ben Lacy, and sister, Mary Tom. She continued to perform with the group/family until 1948, when she left to get married. Eventually Speer-Powell would return decades later to perform sporadically with the group (till its end in 1997), and sometimes with the Gaither Homecoming Series as well. Speer was inducted into the Southern Gospel Music Association in 2005.