More Stars Join 39th NY Pops Birthday Gala . . .
Samantha Barks (currently appearing as Elsa in Disney's Frozen the Musical in London's West End), Josh Gad (voice of Olaf in Disney's Frozen; Tony Award nominee for originating the role of Elder Cunningham in The Book of Mormon), Maggie Lakis (Broadway's Avenue Q), Rob McClure (Tony Award nominee; appeared in Broadway's Avenue Q), and Andrew Rannells (Tony Award nominee fo…