The popularity of EPs in the US had declined in the early 1960s in favour of LPs. In the UK Cliff Richard and The Shadows, both individually and collectively, and The Beatles were the most prolific artists issuing EPs in the 1960s, many of them highly successful releases. The Beatles' "Twist and Shout" outsold most singles for some weeks in 1963. The success of the EP in Britain lasted until around 1967, but it later had a strong revival with punk rock in the late 1970s and the adaptation of the format for 12" and CD singles.