What songs can I sing for gcse music

I’m currently in year 10 and my teacher has already told us that we need to figure out our songs very soon as we are doing practice recordings. I’m singing so I’m trying to figure what’s the best song for me to sing and has a range that can get me good marks. I’m wondering if songs by Adele are good and songs likes part of your world (halle bailey) are good or should I be doing a different genre I am very confused I would appreciate the help🙏