My 3year old daughter makes me loop songs for days in the car.
the last 3 songs we played like 8 times in a row were:
"Concerto for Oboe Violin and Strings in C Minor, BWV 1060: III. Allegro" from the album Bach Collegium Japan (on Itunes. i actually bought this because she heard it on the radio & started singing along)
"Mechanical love" by In This Moment
"Full Moon " by Brandy
Now that's some musical diversity!