(There is no universally agreed-upon term for this genre of music, but at least one reference calls it by this name. It is also referred to as mainstream pop music.)
Traditional pop music is a neologism for Western popular music which encompasses music that succeeded big band music and preceded rock and roll as the most popular kind of music in the United States, most of Europe, and some other parts of the world. Its heyday is considered to be from the late 1940s to early 1960s. It evolved from big band music as a result of the emphasis shifting from the band to the singer.
Singers and groups who typified this genre include:
Golden Music Memories of Yesteryear - A nostalgic website loaded with pictures, articles of the 1940s and 1950s.
Meta Description: [ If you feel that the only truly great music came from the '40's and '50's then this is a web site for you, Golden Music Memories of Yesteryear ]