I need help picking a song...

So at school there's a competition where you can sing or play an instrument and I don't have an instrument so I want to sing. I want to sing a TØP song but I don't know if I want there to be a rap in it. I like rapping but I don't know how the school will react with me rapping. I just need ideas on what song to sing. Thank you for listening |-/💙❤️

P.S. it's a polish school so I don't know if they'll understand if the songs about depression or something like that.