What song should I sing for my school talent show?

Well when i go back to school we have a talent show audition the same month. SO please help me pick a song. Nothing to high please. Nothing about suicide, guns, "it", or any profanity (cuss words). Please let it be sung by a female, and and sometihng preferably r&b. But if it is so good and it isnt r&b then its ok post it up. Please and thank you!!!!!!!