Can sing like Leona Lewis, Adele, Christina Aguilera, and Mariah Carey..... what to sing......?

my voice sounds a little like Leona Lewis, Adele, Christina Aguilera, Beyonce, and Mariah Carey. There is a singing Competition coming up and i dont really know what to sing. I like Jason Maraz and all the other singers like that. 1st place wins $1,000 and 2nd place wins $500. what should i sing?????
Update: also like to sing ordinary people by john legand.... songs like that are my song point......
Update 2: i have had people tell me i sound like those people.... im not conceted....
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