Pop stars love show tunes, and Broadway stars love pop music. So, it was only a matter of time until someone was smart enough to get them together. That event is New York’s annual Elsie Fest (10/8), which brings Broadway’s biggest names onstage with top pop talent to sing one another’s greatest hits. This year’s headliners are Alan Cummings, Lea Michele, and Darren Criss, and they’ll be joined by Ingrid Michaelson, Norm Lewis, and Jeremy Jordan. GA tickets are just $59.99, which gets you in the door at 5 p.m. for the four-hour show.