Listen to Wonder Why (Performance Track In Key Of Ab With Background Vocals) online. Wonder Why (Performance Track In Key Of Ab With Background Vocals) is an English language song and is sung by Avalon. Wonder Why (Performance Track In Key Of Ab With Background Vocals), from the album Wonder Why (Performance Tracks), was released in the year 2009. The duration of the song is 4:00. Download English songs online from JioSaavn.