03:00Sounds of the 70s with Johnnie Walker Sister SledgeBBC Radio 2 Duration: 1 hour, 56 minutes Tue 15th Mar 2016, 03:00 on BBC Radio 2Johnnie hears 70s memories from US disco group Sister Sledge. Show more GenresMusicClassic Pop & RockBrandSounds of the 70s with Johnnie Walker Source: BBC Online