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Ariana Grande
It seems ages ago when Ariana Grande was a beloved Nickelodeon star. At 15, Ariana landed a part in a Broadway play that attracted interest from Nickelodeon. In Nickelodeon’s hit series, Victorious, she played Cat Valentine, and her big break came when she sang on the Victorious soundtrack in 2011. Record producers quickly noticed her deep, powerful voice, comparing her with the great Whitney Houston, and in no time, Ariana was releasing hits like nobody’s business. Despite several controversies throughout her career, Ariana looks strong enough to cement her big leagues’ status.