Their other US singles include a 1982 remake of Mary Wells' 1964 hit "My Guy", "Mama Never Told Me" (1973), and "Thinking of You" (1984), before reaching number one on the UK Singles Chart with the song "Frankie" in 1985. Remixed versions of three of their singles in 1993 returned them to the UK Top 20. Although Kathy undertook a solo career in 1989, she continued to tour with the group (with Kathy occasionally rejoining for one-off performances and several releases in the 1990s). In 2015, Sister Sledge performed for Pope Francis at the World Festival of Families in Philadelphia.