Holy cuteness! Justin Bieber and Hailey Baldwin are full steam ahead with their romance after their tropical trip, and Justin even has the cutest pet name for Hailey, a source tells HollywoodLife.com EXCLUSIVELY. See why, here!

Wow this is adorable! Justin Bieber, 21, has the most precious nickname for his new girlfriend Hailey Baldwin, 19, a source told HollywoodLife.com EXCLUSIVELY. You’ll never guess where he got it, we promise it will melt your heart. Learn what it is and why he calls her that, here!

Aw Justin, who knew you were such a romantic! Well, besides everyone who listens to your music. The pop star is quite enamored with his gorgeous new girlfriend Hailey after their trip to the tropics together over the holidays. But there’s one thing about her in particular that strikes him, and makes her extra-special.

“Justin thinks Hailey is stunning, he loves her long legs and the way she carries herself,” a source told HollywoodLife.com EXCLUSIVELY. “She’s studied ballet her whole life, she’s so graceful and he finds that very attractive.” This lead to such a sweet, endearing nickname for the model. “Justin calls her his ballerina, it’s sweet.” Awww! “ballerina” is literally the cutest nickname ever. It’s dainty, person, and endearing! Talk about Selena Gomez, he simply called her “babe” while they were dating.

Her grace isn’t the only think Justin’s attracted to, though. HollywoodLife.com also found out EXCLUSIVELY that he can’t stop thinking about her mouth. “Her lips are a big turn on for him too, he loves kissing her. She’s just hot in every way, he thinks she’s gorgeous.” Wow, he’s like really, really into this girl! Dare we say this is the closest he’s gotten to loving someone as much as Selena Gomez?

It makes sense. The two have been friends for years, since they were young teens. Justin just recently reminisced about their first meeting, and they look like babies! That’s gotta create a pretty strong bond.