1) Applicant 2) Applier 3) Aspirant 4) Aspirer 5) Emulator 6) Hanger-on 7) Hopeful 8) Many a starlet 9) Number-one single in Finland 10) Number-one single in Germany 11) Number-one single in Scotland 12) One who dreams of fame 13) Overeager aspirant 14) Pretender 15) Spice Girls smash 16) Star-struck emulator Found on https://www.crosswordclues.com/clue/wannabe