Ock Joo-hyun participated in what musical based on a book by T.S. Eliot?
Ock Joo-hyun:  After their unofficial breakup in 2002, Ock released three solo albums and has participated in musicals, namely "Aida", "Chicago", "Cats", "42nd Street", and "The Count of Monte Cristo". Cats (musical): Cats is a musical composed by Andrew Lloyd Webber, based on "Old Possum's Book of Practical Cats" by T. S. Eliot, and produced by Cameron Mackintosh.
Cats