In the summer of 2012, American singer Tanya Ti-et was added to the

In the summer of 2012, American singer Tanya Ti-et was added to the group, often standing in for either Joni or Kim Sledge. With Kim rejoining in 2015, Sister Sledge (Debbie, Joni, and Kim) began touring internationally and eventually performed at a large-scale charity benefit in London for Save the Children . They were invited to perform for Pope Francis at the World Festival of Families in Philadelphia at Eakins Oval on September 26, 2015. According to a representative of Kathy Sledge, Kathy had requested to join the group for the event but the other members refused to allow her to participate in the performance. In December 2015, Debbie Sledge had announced that group was working on another album titled Nothing is Greater Than Love , although the album never materialized.