The 24 New York-area Catholic students who will be serenading Pope Francis at Our Lady Queen of Angels School in East Harlem held their final dress rehearsal on Wednesday — belting out high notes as they prepared to impress their Holy Father during his visit.

“I’m practicing to hold myself together,” Queen of ­Angels principal Joanne Walsh said. “The emotions are starting to rise.”

The choir kids, selected in a lottery, will sing “The Peace Prayer of St. Francis of Assisi” during the pontiff’s 4 p.m. visit Friday.