10 Feb 2012, I had seen this play Krishan vs Kanhaiya. and written a blog post about it here. It is by a seasoned actor Paresh Rawal.
The movie OMG is from this play. People who have seen the movie have liked it a lot. But I would say, live theatre by Paresh Rawal is far better than the movie. If ever, you get an opportunity to watch it, do not miss it. Read more details about the play here.