Help, please

Hi there—I don't mean to be a bother, but you'd be doing me a huge favor if you could help me out. I'm a minor with a mezzo-soprano voice, and I'd like to audition with the song "Don't Lose Ur Head." Everything is set, except I'm not sure how to handle the final riff since I'm just starting out as a singer; if you could make a video explaining it, that would be a massive help.

Idk if the text is written correctly; I don't know much English.