Gigi Hadid Won Big in Sin City Thanks to Zayn Malik

Gigi Hadid knows how to party, which was evidenced at several fabulous birthday celebrations last month. Gigi celebrated turning 21 — twice — in the L.A. area, before taking the party to Las Vegas, where she snagged herself a nice little gift thanks to the help of boyfriend Zayn Malik.

"So on my actual birthday, I spent at the beach with my family and so I actually didn't drink on my 21st birthday. But the week later, I went to Vegas and my boyfriend taught me how to play — you have to do it; you have to do Vegas on your 21st birthday — my boyfriend taught me how to play poker the night before I went to Vegas, so I won $400. Very excited. On a $15 poker table, I thought that was pretty good!" she said, before correcting herself. "Or blackjack. It was blackjack. I just said poker — you guys, I'm nervous!"

While Gigi invited Jimmy to sip some tequila to celebrate after the show, he decided to honor Gigi's milestone birthday with her favorite food: burgers, courtesy of her preferred burger joint in NYC, JG Melon. "The thing about JG Melon's is they're just like super simple, they don’t try too hard and it's so good," she said before taking a big bite.

In addition to birthday gossip and snacks, Gigi also played a round of Catchphrase with Andy Samberg and Washington Nationals' star Bryce Harper, as you can see below.

Of course, her Real Housewives of Beverly Hills mom Yolanda Hadid couldn't help be gush over Gigi's first Tonight Show appearance.

Check out some photos of the Hadid family through the years, below.