After Rush left, Mike Cole was recruited on double bass, and this line-up recorded the first seventeen Mungo Jerry tracks which made up the first album and maxi-single including "In the Summertime". When they made their national debut at the Hollywood Festival, Rush joined them on stage for some numbers to play washboard. The record topped the UK Singles Chart for seven weeks, made No. 1 in 26 countries around the world and to date has sold around 30 million copies.