They're back on their home turf!

Bella Hadid and brother Anwar hit up the Bootsy Bellows annual white party in Malibu for the Fourth of July, and the siblings looked to be having a great time as they jammed along to the DJ and mingled with other party guests.

We're slightly shocked that the supermodel didn't spend the holiday with The Weeknd, because rumor has it they're full-on back together. As far as her baby bro goes, he was photographed kissing Kendall Jenner just a few weeks ago in NYC, but that seems to have just been a fling, because now she's hot and heavy with NBA star Ben Simmons.

Big sis Gigi couldn't join in on the fun, as she's currently vacationing in Mykonos with gal pals. It hasn't all been relaxation overseas, though. The cat walker was recently forced to defended her relationship with Zayn Malik on a nasty fan account, after haters tried calling their romance fake, pointing to the fact the "Pillowtalk" crooner doesn't "follow" his lady love on Instagram.

"Seems like u guys tag me in a new post every day … pls stop.. it’s just negative, I really have no hard feelings towards you I just know what a beautiful world there is to go out and live in instead of trying to dissect a relationship between two people that you don’t even know and that you do not see 99% of… for someone who is virtually inactive on the app, I don’t need his follow- my eyes are tattooed to his chest," she wrote in a lengthy comment.

On another note, we wonder if Bella and Anwar discussed their former stepdad David Foster's new engagement to Katharine McPhee during their beach day?