Petite porn stars that get implants always end up looking hideous. Lupe Fuentes is a good example. She looked so young that she actually had to prove her age in court on behalf of some poor guy who got charged with possession of child pornography by an asshole DA because he came through US customs with one of her DVDs. Then she got bolt-ons and overnight she aged 10 years and looks like an ugly 30-something plastic doll now.
I suppose the opposite is true too. It rarely ends well when a porn star gets a breast reduction either. Siri was immensely popular because of her full figure and big naturals. She did a lot of scenes, retired, got a reduction, then came back. She looks awful now. She got rid of what made her so popular in the first place. I wonder if she realizes why she's not as popular anymore.