Models prepare for fashion shows in various ways, but Lady Gaga tried out something new on Thursday.

The 29-year-old decided to gear up to walk in the Marc Jacobs Fall 2016 show as part of New York Fashion Week by exercising in her underwear.

Gaga cheekily flashed her bottom in a black thong and matching bra as she did push-ups, while a friend recorded it all for Snapchat.

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Getting pumped: Lady Gaga did push-ups in her underwear ahead of the Marc Jacobs New York Fashion Week show on Thursday

The pop star was seen doing four push-ups, as her pal started to laugh and she tried not to break into giggles too.

Gaga's impressive collection of tattoos - almost all of which are on her left side - was visible as she worked out in her underwear.

The singer had her peroxide blonde hair pulled into a bun, having returned to showing off platinum locks after wearing a bright orange wig for the Grammy Awards on Monday.

The singer has a close relationship with Marc Jacobs, who dressed her for her David Bowie tribute during the ceremony.

See more of the latest on Lady Gaga as walks in a Marc Jacobs NYFW show

She's a cheeky one: The heavily tattooed 29-year-old left very little to the imagination in a black thong and bra

Silly: Gaga's friend was recording the mini-workout for Snapchat, and couldn't help but laugh as the star tried not to do the same

During the show, Gaga walked the runway in an oversized coat with fur trim and a pale green shirt with large bow.

All the models had their hair teased into 1920s style finger waves, and wore dramatic eye make-up and black lipstick.

They also had to walk in sky high platform shoes, something which Gaga is very much accustomed to doing.

All about the drama: The pop star looked like a pro as she graced the runway in an oversized coat

She's used to it: Gaga had no trouble walking in the sky high platforms, which she does on a regular basis

Almost unrecognisable: The singer was made-up with heavy black eyeliner and matching lipstick, and had her hair styled in finger waves

The Applause hit-maker strutted behind seasoned model Kendall Jenner for the finale walk.

However this is not Gaga's first time walking in a fashion show - she has previously graced catwalks for the likes of Thierry Mugler and Philip Treacy.

Earlier on Thursday, the American Horror Story: Hotel star was seen heading to Park Avenue Armory for the show in a dramatic, full navy skirt and tight black turtleneck top.

Blending in: Gaga was a natural as she strutted down the catwalk, before standing behind Kendall Jenner for the finale walk

'Thank you for being the beautiful woman that you are': Marc Jacobs shared a photo while fitting Gaga for the show