While the whole of America was busy celebrating Thanksgiving on Thursday, it was a double celebration in the Bieber household since Hailey Baldwin's birthday happened to fall on the same day.

And Justin made sure his babe got to have her cake and eat it in a hilarious birthday prank.

Yep, while Hailey's 22nd was full of sickeningly-sweet moments, Justin proved he can do silly just as well when he pied Hailey in the face with a massive cake.

Justin's mum, Pattie Mallette, caught the whole thing on camera, and luckily Hailey wasn't even a bit mad.

Thankfully, Justin was prepared for the consequences of his actions as he went on for a cake face-filled kiss.

Someone at the soirée can be heard shouting: "First married birthday!" just in case we needed one final confirmation that the pairalready tied the knot.

Obvs Justin wasn't about to pull a prank like that without a backup plan, and later he could be seen bringing Hailey a cake filled with 22 candles.

After the birthday gal was able to blow them all out in one effortless go, Justin went into romantic mode as he called his wife"absolutely amazing," and the "love of my life," in a cute speech.

The whole day was an epic Baldwin/Bieber celebration, as both families came together to celebrate Thanksgiving too.

Hailey's dad Stephen Baldwin was therealong with Hailey's cousin Kahlea Baldwin, who shared a cute vid and wrote: "Wife's first Thanksgiving @haileybieber."

We don't know about you, but we're so thankful for Hailey and Justin Bieber.