that's because nikki reed is z-list...she wrote "Thirteen"...which was what some teenagers experienced before and you learn or hear about those drugs, sex stories or mistakes...so she wrote one and made into a movie was because her dad was dating catherine hardwicke at the time, so i don't consider her as an a-lister, and who cares who paris latsis dates...
what people think is an "authentic" joan jett is different from what Joan actually thinks...so yes it's great that joan was there to coach her, but she could also be coaching kristen to be what joan wants her to look like..not necessarily what the "authentic" joan is
vanessa can't sing OR act, so i dont' know why she bothers to do EITHER!