Hammerstein Ballroom is housing another unique show, sure to be filled with heavy metal and yes—harmonic, poetic vocals. Delain returns for a performance in the middle of their massive international tour on April 9. Johanna Charlotte Wessels’ voice is perfectly honeyed against the band’s colossal instrumentation. This can explain their amazing U.S. following, even though they are based out of the Netherlands. They are also making a stop at Electric Factory in Philadelphia on April 10.