In late 1957, Wilson left for a solo career and was replaced by Gene Mumford of the Larks, after which the group signed a contract with Liberty Records. They had a #13 pop hit with "Star Dust". "Star Dust" was one of the earliest multitrack recordings in the rock and roll era. The session was on March 7, 1957. The tapes have been mixed into true stereo, making the recording one of the first songs (1957) by a rock and roll/R&B artist in true stereo. The track also reached #13 in the UK Singles Chart in October 1957. It was to be their only million seller. It was followed by "Deep Purple". This proved to be their last major success, although various lineups of the group continued recording and performing into the 1960s.