what song should i sing? (1)

after my spring concert we have only a few chorus classes left and my chorus teacher said we will have a talent show where we can only sing on stage but we will sing with the words that she puts on the smart board meaning that she will put the song we are going to sing on the board so we know the words but the problem is i have no clue what to sing. can u please help me? leave the song and the person who sings it. but it has to be appropriate for school as for i am only in 6th grade.