Jazzie B and several other members of the group became involved in the local pirate radio station movement. Jazzie B hosted a show on KISS-FM. In March 1989, their label released the group's single "Keep on Movin', featuring Caron Wheeler on lead vocals. The song became a success and also sold over one million copies in the US. The following month, the group's first album Club Classics Vol. One was released. The album peaked at number one on the UK Albums Chart and sold over four million copies worldwide. The group's next single, "Back to Life", became their biggest hit, hitting the top five on the US Hot 100 and number one on the UK Singles chart. The single went on to win the group their first Grammy Award for Best R&B Performance by a Duo or Group with Vocal in 1990. The group would continue to see some UK success but "Back to Life" would be the second and last US hit for the group. In late 1989, Waddell and Windross departed from the group. Marcia Lewis, a cousin of Jazzie B, joined the group. The single "Get a Life", which featured Lewis on lead vocals, charted at number three on the UK Singles chart. The song also sold over 60 thousand copies in the United Kingdom. Lewis' debut performance came on Top of the Pops when she performed alongside Caron Wheeler and Jazzie B. 1990: Volume II A New Decade and lineup changes In early 1990, Wheeler officially left the group to pursue her solo career. To fill out the group's dynamic, Jazzie B turned to a few singers he had performed with in the past. This led to the brief addition of Kym Mazelle, Lamya, and Victoria Wilson-James to the new lineup. With a new official lineup, the group released their second album, Vol. II: 1990 – A New Decade, which peaked at number one on the UK Albums Chart. The album's second single "A Dream's a Dream", which features Victoria Wilson James on lead vocals, performed well on the chart. The album's third single "People", featuring Lewis on lead vocals, garnered moderate success on the charts but managed to achieve success on the Dance charts. The album's final single "Missing You", featuring Kym Mazelle on lead vocals, also performed well on the charts. In the mid-1990s, the group toured throughout the United Kingdom. One of their