"Sing! AHH! Sing for me! AHHH!" If you've read, watched or heard the Phantom of the Opera then you'll probably get the reference. Known to be one of the longest-running show in Broadway, the Phantom of the Opera has made its way back to Singapore with yet another show to its tour — and this time we're giving our full review of the musical and what you can expect from first-timers point of view.