Just recently, during a concert at Coachella, Dr. Dre and others performed with the hologram of Tupac. Technology has come a long way to bring back a dead rapper.
Now Imagine the same technology used to bring The Chipmunks and Chipettes virtually to life. They could perform along with real artist.
You could see them scamper on stage, chat with the audience, and watch them do dance numbers. This could be done in different tours around the country.