For Leigh-Anne, it's all about the '90s. "We had a stage where everyone was just doing nineties fashion - and it's still going," Leigh-Anne says. "To be fair, it's timeless. It's one of those things that's just kind of around anyway."
Leigh-Anne is undeniably influenced by the decade, consistently wearing hoop earrings, vintage crops and updated sports jersey. It's also the singers hair and makeup choices that reflect the love of the '90s - from deep browns to sleeked braids.
For Perrie, on the other hand, it's all about the '60s. "I love the sixties," she says. "The Twiggy, bottom lashes - she's one of my icons."
"I think when it comes to just different fashion and makeup, we just love experimenting and embracing what we like," Perrie adds.
The entertainers' love of '60s flare is evident in her recent looks - just take her winged liner and headbands as a start.
While both Leigh-Anne and Perrie admit that they see these trends coming back, they both believe fashion is about expressing oneself.
"We always do our own stuff anyway, regardless of what's in," Perrie says. "We still wear random sh*t and experiment with our style and hair and makeup."
Little Mix are heading back to Australia in December - check out dates and tickets here.
Check out Little Mix's new single Bounce Back below: