Jesy uploaded a picture of her new piercing to the group's Twitter account on Friday morning (24 January), writing: "Wheeheyyy got my nose pierced tonight with miss Perrie winkle now look who's the bad influence ;)"
Perrie has a nose piercing of her own, as well as one on her neck, although it doesn't look like she's convinced Jesy to get the latter just yet.
Little Mix are currently on a promotional trip to Japan, where a slew of fans turned up at the airport to give them a warm welcome.
Jade Thirlwall tweeted: "It's good to be back Japan! Thanks so much to the mixers and label for such a lovely welcome."
It's a busy time for Little Mix as they'll be jetting off to the US next month to support Demi Lovato on her 'Neon Lights Tour'.
They'll be joined by Cher Lloyd and US band Fifth Harmony.
Demi was full of praise for Little Mix when she visited Capital FM in London last year, saying: "They have incredible vocals and they're super talented… I think they're beautiful, talented girls and I'm a fan."
Little Mix have also recorded the official song for this year's Sport Relief, a cover version of 'Word Up' which is available to download from 16 March and buy in shops from 17 March.
The group travelled to Liberia earlier this month to see firsthand how some of the money raised can help local communities.
Watch Little Mix's video for recent track 'Little Me' below: