A fourth soundtrack album, The Music of Smash: The Complete Season 2, was released digitally exclusively by iTunes on May 21, 2013.
Most songs in the first season are performed by the cast of Bombshell, which consistently includes Karen Cartwright (Katharine McPhee) and Ivy Lynn (Megan Hilty), and, at times, Michael Swift (Will Chase) and Rebecca Duvall (Uma Thurman).
Other main characters to sing include Tom Levitt (Christian Borle), Dev Sundaram (Raza Jaffrey), Frank Houston (Brian d'Arcy James), Ellis Boyd (Jaime Cepero), and Eileen Rand (Anjelica Huston).
These have included Nick Jonas as television star Lyle West, Bernadette Peters as Ivy's mother Leigh Conroy, Annaleigh Ashford as Lisa McMann, and Norbert Leo Butz as himself.
Other vocal performers include Veronica Moore (Jennifer Hudson), Jimmy Collins (Jeremy Jordan), Kyle Bishop (Andy Mientus), Ana Vargas (Krysta Rodriguez), Leigh Conroy (Bernadette Peters), Tom Levitt (Christian Borle), Julia Houston (Debra Messing), Sam Strickland (Leslie Odom, Jr.), Terry Falls (Sean Hayes), Simon as JFK (Julian Ovenden), Daisy Parker (Mara Davi), unnamed actress playing young Marilyn (Sophia Anne Caruso) and ensemble members Bobby (Wesley Taylor) and Jessica (Savannah Wise).