Which female star will endorse Caribbean Bay with 2PM?

Popular water park�Caribbean Bay posted a new teaser photo for their endorsement with 2PM.

2PM previously acted as the spokesmodels for Carribbean Bay alongside Girls' Generation, and member Nichkhun promoted with Victoria of f(x) as well. The water park is now asking you to figure out who will be the next lucky female star to work with the group.

Everland, the parent company of Caribbean Bay, posted to their official Twitter on June 1, "Who is the girl in the photo to make Caribbean Bay shine with 2PM in 2012? Ten of those who follow + retweet + guess the correct answer will be gifted 2 tickets each to�Caribbean�Bay! (6/8 announcement)."

Any guesses?

Source + Photo: Everland's Twitter
Tip: Paula