Well, I don't know about ANY celeb's curls (because then I could probably go on forever) but if I could have any celeb's curls that are closest to my own I would have Kate Winslet's curls:
No-'poo since 28 Apr 09!
2c/3a, fine to medium texture, low to medium porosity, normal elasticity, medium density.
Cleanse: Deva Lo-Poo or Kinky Curly Come Clean
Condition: Kinky Curly Knot Today or Suave Naturals Coconut
Stylers: KCCC, BRHG, Moroccan Dry-No-More oil, Mister Right
NO: bad 'quats, 'cones, 'xanes, drying alcohols, sulfates, or petrochemicals.