As previously reported, Ahrens and Flaherty's Ragtime and A Man of No Importance collaborator, Tony winner Terrence McNally, will host the 7 PM concert conducted by Pops music director Steven Reineke.
A black-tie dinner follows the April 30 benefit gala.
Previously announced to perform are Liz Callaway, Kevin Chamberlin, LaChanze, Jason Danieley, Boyd Gaines, Kecia Lewis-Evans, Darlene Love, Rebecca Luker, Marin Mazzie, Tiler Peck and Andrew Rannells.
The Pops will also be joined by Bad Habit and the Ronald McDonald House Chorus, Camp Broadway Kids and Judith Clurman's Essential Voices USA.
Single tickets to the concert-only are $60 and $90. To purchase, call CarnegieCharge at (212) 247-7800, visit the Carnegie Hall Box Office at 57th St. and 7th Ave., or online at Carnegiehall.org.
Tickets to the full gala evening range from $1,000 (for one concert ticket and dinner seating) to $50,000 (for a first-tier box and dinner table for eight). For more information about the black-tie benefit dinner dance at The Plaza Hotel, call (212) 765-7677 or visit NewYorkPops.org.