Who are the best tribute bands you have ever seen?

For me, I'd have to pick 2: Lights and 40 oz. to Freedom. Lights is a Journey tribute band while 40 oz. to Freedom is an homage to one of the most underrated bands of all-time, Sublime. I have seen both bands numerous times and can honestly say that both bands have never failed to put on a great show. Both are remarkably talented and I've often said that they may even be better than the original bands. I will be in Las Vegas in July when 40 oz. to Freedom are playing at The Crown Theater in The Rio so I'm looking forward to that. It will mark the 7th time I've seen them live. I was searching around the Crown website - http://www.thecrownvegas.com - and I see that Lights is playing on May 30. I guess this venue knows how to book great tribute bands!!!!