 Kitsis and Horowitz confirmed the report in February.They have also since confirmed that the episode will feature 7 original songs, including solos by Jennifer Morrison and Rebecca Mader, as well as a "sing-off" musical number featuring the Evil Queen and the Charmings.Composers Alan Zachary and Michael Weiner will be writing the original numbers featured, with arrangements provided by the show's long-time composer Mark Isham.