Having composed 'Crazy Little Thing Called Love' on guitar, Mercury played rhythm guitar while performing the song live, which was the first time he played guitar in concert with Queen. It was the band's final single release of the 1970s. It topped the Australian ARIA Charts for seven weeks. The song peaked at number two in the UK Singles Chart in 1979, becoming the group's first number-one single on the Billboard Hot 100 in the US in 1980, remaining there for four consecutive weeks. Written by Freddie Mercury in 1979, the track is included on their 1980 album The Game, and also appears on the band's compilation album Greatest Hits in 1981. ' Crazy Little Thing Called Love' is a song by the British rock band Queen. 'Crazy Little Thing Called Love' on YouTube