The actors do their jobs - there is a great deal of mugging, and no depth. One gets the feeling the whole project was rushed through.
The second greatest story ever told? Why, the Titanic, of course.
Of course, musicals are primarily pure entertainment and not learning vehicles, but in this case the emphasis on gloss is disappointing because the source material, the 1988 "Hairspray", managed to be thoroughly entertaining while slyly slipping in quite a bit of social commentary. Not just acceptance of the "pleasantly plump" and integration - think of the contrast in that movie between the Turnblad family and the Pingleton and Von Tussle families. The Turnblads may have been the somewhat oddball group, but there was real affection and acceptance there, as opposed to the corrosive relations in the other two families. All this subtext is stripped out of the musical "Hairspray", and it is a less satisfying movie for that.
It is a lot of fun, but once is enough - it is the original "Hairspray" that you will want to see again.