From your OP it does sound like you want complete songs that are karoke style.... pop hits already done and ready to go.

I would suggest looking into some of the midi karoke sites on the internet that will provide you with free or low cost midi versions ready to go.

BB and RB will not do that. There are demos in it, but they are not the pop hits you seem to be asking for.

What it will do, and it does it well, is to provide you a template where you can search for a style by the name of a song and it has a good chance of getting pretty close to that overall style....but you then must enter the chords and "write" the song. Also.... by using this style feature, you can get pretty close to an authentic cover of a song. Obviously, some will be closer and thus better than others depending on the song and the musical style/genre of the original song.

I do a few covers for grins and fun, and the ones I have done are a combination of the real tracks and my live playing to make it sound as close as I can if that was my intent. Some of them are amazingly close to the original. Others.... not so much.

You can find my music at:
www.herbhartley.com
Add nothing that adds nothing to the music.
You can make excuses or you can make progress but not both.

The magic you are looking for is in the work you are avoiding.