That's 16-year-old Samia Finnerty, musician and daughter of actress Kathy Najimy, posing provocatively with another dumb double-entendre.
PETA calls her their "youngest pinup" and states:
PETA normally waits until people turn 18 before asking them to star in a "provocative" campaign, but not this time. Sixteen-year-old singer-songwriter Samia Najimy Finnerty stars in our new "Vegans Go All the Way" ad.Classy. I also question the social marketing strategy of dissing vegetarians as being some kind of lesser vegans. Way to alienate a large proportion of your base, PETA!