Could be anything. Pretty much just listen to music during the 670-mile trip between MA and OBX that I do five times a year. Have over 7,000 songs from CDs on a memory stick. Listen to songs in alphabetical order, so no idea what's coming on. Could be rock, folk, folk rock, pop, bluegrass, Americana, country, Celtic rock, disco, big band, 40s, 50s, 60s, 70s, 80s, 90s dance, new wave, AM hits, songs of WWII, surf instrumentals, Broadway musicals, movie musical soundtracks, monks, German beer garden songs, and so on ... literally anything.
Neat hearing "In the Mood" by Glen Miller followed by "In the Navy" by The Village People.
Or "Stairway to the Stars" by (70s glam rock band) Sweet followed by "Starway to the Stars," different song, by The Glen Miller Orchestra.
Or "Perfidia" by both the Glen Miller Orchestra and The Ventures.