Vocals: Idina Menzel - Vocals: David Bisbal - Vibraphone: Ron Fair - Glockenspiel: Ron Fair - Celesta: Ron Fair - Orchestra: Los Angeles Orchestra - Recording Engineer: Peter Mokran - Recording Engineer: Ron Fair - Asst. Recording Engineer: Patrick Thrall - Recording Arranger: Chris Walden - Mixer: Peter Mokran - Mastering Engineer: Ted Jensen - Producer: Ron Fair - Vocal Engineer: Pablo Cebrian