Not every successful singer you listen to today has had a great start. To reach great heights in their career, every big music star started off as a support vocalist or as a backup singer. From Katy Perry to Cher, almost every music star has gone through their own share of struggles to achieve what they have today. Sometimes it takes time even for the producers to spot that one talent from the crowd of so many singers. Take a look at this list to find out who are these celebrities who worked as a backup singer during the start of their career. There are a few names on this list that you won’t believe.