J Balvin Throws Shock Celebration For Girlfriend Valentina Ferrer’s thirtieth Birthday

J Balvin knows how to have a good time … and he made sure his model GF was doin’ the same for her birthday, which is why he threw her a luxurious surprise party!

The Colombian artist rented out a massive villa — over 7,000 square feet — on the Miami Beach waterfront for his boo, Valentina Ferrer‘s, 30th bday Sunday night … with about 35 people showing up to celebrate, including her family.

We’re told he flew her parents, siblings and other family members out from Argentina for the big day — their 2-year-old son, Rio, was also in attendance but likely didn’t party as hard as the rest of them.

The food was another highlight … J Balvin hired a private chef from Colombia who put together a spread of Argentinian meats to enjoy. There was also a DJ bumping beats throughout the night  — and no, JB unfortunately took the night off and didn’t perform.

We’re told Valentina had no idea about the party, so it was a well-kept secret … especially getting her whole fam to show up!

FYI, it was a whirlwind weekend for the couple … they were enjoying the NASCAR Cup Series in Tennessee Saturday where J launched his shoe collab with Nike Jordan before jetting over to Miami.