Backup singers often stand in the shadows, harmonizing beautifully while the spotlight shines on the headliner. Yet, some of the biggest names in music began their journeys behind the mic as background vocalists, honing their craft and preparing for their own claim to fame.

Remember when the "Queen of Christmas" had to put her backup singer(s) back in line? A moment that further cemented her diva reputation...but can you blame her? Mariah Carey wasn't always centerstage. She earned her spot at the top by starting from the bottom.

Keep reading and you'll find that her humble beginnings -- working hard while taking a backseat, lending her vocals to other big names -- was the start of catapulting her into superstar status, so she's justified in telling her background vocalist to:

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