Yes, it happens...
How does it happen? Let's break it down...
1. Great talent.
2. Great versions of songs that people were already familiar with, were looking for, and wanted to hear...
The leverage you get from utilizing a path that has already been constructed is one of the reasons I'm a huge fan of covers, remixes, and samples. If you don't have a "familar, but done in a different way" cover on your album, YouTube page, or live setlist, you are leaving money on the table!
And speaking of leverage, the 3:53 of the video above is a perfect example of it and something you should be doing with your videos.
3. Great original songs.
4. A following that proved the concept worked.
5. As Cory Robbins said, the group is "ready to go" with little artist development needed.
Visit AHMIRmusic.com for more information on AHMIR.