Justin Bieber and Hailey Baldwin Pack on PDA During New Years' Vacation

— -- Childhood friends Justin Bieber and Hailey Baldwin spent the New Year together, vacationing in a tropical locale. But fans aren't freaking out about that -- instead, they're obsessing about new photos of the two looking particularly close.

Baldwin, the daughter of actor Stephen Baldwin, posted a photo Friday that shows her kissing Bieber's neck with her arms wrapped tightly around him. The 21-year-old singer seems to enjoy the public display of affection as he looks directly into the camera.

The model captioned the photo: "New Years."

Baldwin, 19, and Bieber have side-stepped romance rumors for a while. Although Beliebers have already created a moniker for the two -- "Jailey" -- Baldwin told E! News last month that she was just friends with the pop star.

"I've known him since I was so young -- since I was like 13 -- and we've just been good friends over the years," she said. "We have just stayed close and there's nothing more to it than that."

Based on other photos posted to Instagram earlier this week by Baldwin and Beiber, it seems the two have spent a couple of days together with Bieber's family, including his father, Jeremy.

Check out more photos of the pair below: