How the musical became big business: 'The snowball has been building for a long time'
From Spongebob Squarepants to Mean Girls, Broadway is gearing up for a wave of new musicals and with TV and film projects too, the genre is back on topOn the heels of its most lucrative season yet, with a record-setting $1.37b in ticket sales, Broadway has experienced something of a rebirth. From the success of La La Land on the big screen to Hamilton onstage, there's a collective renewed interest in theater that's b…