Money (That's What I Want)
Musicologist Walter Everett highlights the riff as an example of the Beatles drawing inspiration from other artists and improving on the source material. He sees the "Day Tripper" riff as a combination of the ostinatos heard on Motown recordings such as the Temptations' "My Girl", Barrett Strong's "Money (That's What I Want)" and Marvin Gaye's "I'll Be Doggone", while also incorporating a rockabilly element that recalls Roy Orbison's "Oh, Pretty Woman".