Sigourney Weaver in Alien 3 (1992)
Demi Moore in G.I.Jane (1997)
Kate Blanchett in Heaven (2002)
Natalie Portman in V for Vendetta (2005)
Cameron Diaz wore a bald cap for My Sister's Keeper (2009)
Hot model Amber Rose (Kanye West's main squeeze) keeps her hair buzzed and closely-cropped all the time! She even dyes it blonde. Very edgy and chic.