Premise: Katelyn Tarver (born November 2, 1989) is an American actress and singer. She is known for her recurring roles as Jo Taylor on the Nickelodeon series "Big Time Rush", Natalie on the ABC series "No Ordinary Family", and Mercedes on ABC Family "The Secret Life of the American Teenager".
Hypothesis: Katelyn Tarver was in "Big Time Rush" which was a top 10 series on Nickelodeon.