‘Sing It On’ gets Legend’s help

Singer-songwriter John Legend is executive producing a documentary-style series on an a cappella competition for cable network Pop, formerly the TV Guide Network.

Inspired by the hit movie “Pitch Perfect,” the series “Sing It On” will premiere at 10 p.m. May 13. The eight-episode series will go behind the scenes to follow five collegiate a cappella teams as they compete in the International Championship of Collegiate A Cappella finals.