Little Mix "sing on treadmills" to prepare for their tours.
The 'Love Me Like You' hitmakers - who are known for their high-energy dance routines during their sets - have an unusual way of preparing for their live shows.
Perrie Edwards shared: "Luckily we're in a group so we can go [hard] on the choreography and draw it back in the slow songs.
"You have to find the balance. You have to keep up your fitness. We do a lot of rehearsals before the show, lots of singing on treadmills."
But the band - which also includes Jesy Nelson, Leigh-Anne Pinnock and Jade Thirlwall - find it hard when they are accused of miming because they can stay in tune when they dance.
Jesy explained to news.com.au: "It's so hard and no one understands how hard it is. What's really frustrating is you'll do a really good vocal and someone will go, 'They're miming' and you think, 'I'm definitely not, I'm just really good at singing!'
"It's kind of a compliment, but sometimes you want to say, 'Shut up, you don't know what you're talking about'. If you sing really smooth people assume you're miming just because you're not out of tune."