When someone sees a hairbow, they think Lady Gaga. That's something she did that caught on.
Beyonce's legs, Katy's boobs, and Nicki and J. Lo's butts, while all great, do not scream iconic. If I see a big butt, I don't think "Nicki Minaj".
& Lana's lips
no way. same with Rihanna's hair... it's just red hair. If other girls did it, it's a trend. Not iconic.