On the flip side of the brilliant "Walk Away Renee" 45 is the also wonderful "Pretty Ballerina". Both are sterling examples of Baroque Pop, a sub-genre. ;-)
We tend to take The Beatles for granted (I perhaps more than most); they had more excellent Pop-type songs than any other Rock Group you can name, from "I Saw Her Standing There", "Please Please Me", "Love Me Do", "She Loves You", and "I Want To Hold Your Hand", to "Come Together", "Because", "Something" (gorgeous), and "Here Comes The Sun", the last two written by George Harrison, who by ’69 had caught up with Lennon & McCartney. McCartney credits Buddy Holly with giving him his sense of melody. Buddy was just getting started when his plane went down, a real tragedy.
A Pop song can be performed in just about any style, and many have been. What is now considered Country, for example, is largely Pop music. A far cry from it’s Hillbilly beginnings.