Need a song to sing for MIDDLE SCHOOL TALENT SHOW!?

ok so theres this talent show next week and i have no idea what to sing ....does anyone have any idea for good clean songs any r&b slow or upbeat songs it will be good if yhu could give me it least 2 but 1 will be ok i just need help and nothing that will get me laughed and i also do pop songs to. urgent help!