"The four of us are really in sync with each other," said Brooke. "We're pretty open about most things. We try to respect each other as much as we can. For us, communication is really important."
Here are four other key points from their cover shoot:
2) Compliments are key
What's the point of being in a badass girl group if you can't tell your bandmates how awesome they are?
"It's so important," Jauregui said. "I feel like especially being around other girls, it's really easy to start picking yourself apart and being like, 'Wow, she looks better than me.' Giving each other that energy changes the whole vibe of whatever we're doing. If it's a carpet or a shoot, you can feel in the pictures that we were all complimenting each other and we all felt good."
Brooke added, "We truly live by female empowerment. Literally every day we try our best to do that."
3) Boys don't always know how to deal with them
Dating boys can be weird at the best of times - and being successful and famous pop stars doesn't exactly help.
Dinah Jane explained, "My thing is, when I come across somebody, when I think they're super cute or handsome, I can't play along with that because sometimes they take it as something like, 'She wants me.' And it's happened to me many times. When you're trying to be kind to somebody and they take it as, 'Dang, Dinah Jane likes me.' And I'm like, 'No, I just want to be your friend... like, why do you have to take it like that?'"
Kordei added, "For me, it's kind of the opposite, 'cause I feel like, in a way, I can be so intimidating with me not even knowing it, and then the guy doesn't call you and you're like, 'I'm cute! Come to me. Come here.' And then it's like, 'Is there something wrong with me?'"
4) Girl-on-girl hate is a problem
Jauregui couldn't help but notice that the group gets slut-shamed all the time - even from other girls.
"I'm pretty sure men are never questioned whether they're acting too sexy. They're actually glorified when all their clothes are off. Women love that shit, they're like, 'Yeahhh! You're so hot!' But when girls take our clothes off, it's, 'Wow, she's such a hoe.'"
Their first album as a foursome is on the way, and Jane hinted that it "will have some R&B tones." In the meantime, Jauregui said she feels they have low-key left a legacy already. "We've made an impressionable mark as far as girl groups go in the industry. I'm proud of us."
Kordei said they were following in the footsteps of powerful girl groups before them. "I know we've all grown up listening to Destiny's Child, Spice Girls, TLC, Pussycat Dolls even. ... And it's important to have strong individuals to paint the way for us. Without them doing what they did for music, and being our introduction, we probably wouldn't even be!"