First I do not draw celebrities because I simply can't... Reference Images ARE A MUST, you have no idea how much a picture can help get your point across when I begin.
1. Do you wan't 1.8+ features then simply Yes or No (helmet doesn't count as 1.8+ feature)
2. Head, Hair or no hair? Hat or no hat? colour(s)
3. Hair or no hair/style, colour(s)
4. eyes, colour(s) (No eyes??)
5. chest, shirt or no shirt/style, and colour(s)
6. legs, pants or no pants/style, colour(s)
7. shoes or no shoes/style, colour
And there you have it, answer these questions and we are good to go! Remember REFERENCE IMAGES!