Before taking the stage, Gigi opened up to the VS cameras, and got emotional discussing her and Bella's long road to the renowned runway.
"I have watched the show every single year as a kid, so last year was so special to be able to do it," Gigi said, recounting her VSFS debut with bestie Kendall Jenner last year. "This year, joining me is my little sister!"
"I'm going to cry, sorry," Gigi, 21, added, wiping tears from her eyes. "I am so proud of [Bella] for getting this show because she worked so hard. [And] for us to be able to do it together, and be the first sisters in the show, we're really, really honored."
Bella, 20, also had a hard time keeping back the waterworks as the sisters smiled together and cried tears of joy.
"This is us happy," Bella explained to the cameras. "We're a really emotional family."
"It's amazing to be able to experience all this and to be so excited for each other," Gigi added. "She's my best friend and it's so crazy to be here together."
After getting their emotional excitement under control, the stunning sisters hit the runway where they absolutely slayed, rocking super sexy, skin baring ensembles like seasoned pros.
Gigi, in particular, looked fabulous and fierce during Lady Gaga's performance of "John Wayne," even singing along to some of the pop star's lyrics as she confidently strutted her stuff.
Gigi and Bella's mom, Yolanda Hadid, spoke with ET before the show, and couldn't contain her excitement. "I'm just so proud," she exclaimed, "and grateful that we get the opportunity as a family to experience this in this moment in time." Check out the video below to hear more.