Quark
Der Beste
Looks like the 70,000 tons of metal cruise. I asked an acquaintence who went last year about her experience and she said it was amazing. She also said it couldn't be compared with open air festivals because there's nothing quite like watching a band while sitting in a pool/spa (amongst other quirks that come with being on a cruise ship).
My only problem with 70k tons, it's on a boat. Even if it is a cruise.