Can you match your lips to the actual words? If it’s as noticeable as Mariah, you’re not doing it right.
Stage presence covers your style, song, wardrobe and dance moves. Dancers and band mates count too.
If the crowd is pumped up, you’ll have a better chance to win. Even if it’s mostly your family.
Singing their song is one thing, your ability to capture and imitate your artist plays a part as well.