For the cheeky snap, Billie hung upside down from a gym apparatus as she rested all her weight on her hips and tipped herself forward. She kicked her legs in the air and from down below, the Bad Guy singer lifted her phone up to capture a quick selfie.

The songstress wore a black tank top and exposed her arms, styled with a pair of black biker shorts on her bottom half. Eilish couldn’t resist showing off her toned figure as she posed her legs upwards.

She added a pair of black socks to her outfit and appeared to be wearing a red bracelet on her wrist. In the background, fans caught a glimpse of the gym which was covered in machines and mirrored walls.

Billie tipped herself upside down to get the selfie

Eilish took to Instagram to share the picture in a carousel post among other pictures, including a selfie wearing an orange bandana, a picture of some mountains, a tray of cinnamon buns, Billie wearing all black in an elevator, the misty view from a car window and the clouds on a gloomy day.

In the caption, Billie wrote “I don’t know,” as her fans flocked to the comment section. One person noted that she is “dropping shoes, perfume and is about to open a whole restaurant” but hasn’t “teased her fans with a single or the album”.

SponsoredSCMP for Sanya Tourism BoardSanya boosts efforts to attract overseas tourists to its tropical shoresby TaboolaBillie’s fans have been begging her for some new music

Regarding her cheeky gym snap, one person wrote: “Girl, how’d you get in that position,”

Others branded Billie the “queen of pop,” a “cutie,” “the prettiest” and a “gym girl” as they begged for details on her new album. Another eager fan wrote: “The gym pic, [oh my f***ing god],” as one comment read: “My favourite forever and ever and ever.”

Billie added a sweet picture of herself as a young child

In the carousel post, Billie also added a picture of herself as a child wearing a white Powerpuff Girls t-shirt and a blue and pink pleated skirt. She was captured playing with a saucepan while her face was covered in food.

Billie looked through her eyebrows directly at the camera and fans fawned over her adorable throwback. Someone typed: “Kinda funny as a kid, she already had that classic Billie Eilish look on her face.”