"Day Tripper" is a song by English rock band the Beatles. It was released as a double A-side single with "We Can Work it Out" on 3 December 1965. This was at the same time as the band's album "Rubber Soul". It was written mainly by John Lennon, but was listed as Lennon–McCartney. It was part of the first double A-side in the United Kingdom. "Day Tripper"/"We Can Work it Out" was the 7th highest selling single of the 1960s in the United Kingdom. The main part of the song is a guitar riff that Lennon wrote.<ref name="Pollack/Notes"></ref> He got the idea for this riff from Bobby Parker's song "Watch Your Step".