Hailey Baldwin's Toronto Bday Pad is Sick!

Hailey Baldwin got pampered for her 20th birthday ... and this SICK crib's all the proof you need.

Hailey got away from busy NYC and jetted off to Toronto to celebrate her birthday Tuesday in this stunning Airbnb rental, hooked up by the company.

This 4 bedroom, 5 bathroom pad is part sleek and part charming -- from its modern amenities to cozy outdoor space, it's the perfect place to get turnt. It's got a sweet lap pool, sauna, theater, elevator and a baller private garage.

How baller is it? Just ask Gigi Hadid ... she's stayed here before.

BTW ... they were drinking rose and other stuff, but it's all legal. Drinking age is 19.

It's quite a bargain too ... around $3k per night.