Billie Eilish spotted sitting in economy seat while traveling on a commercial airline flight

Billie Eilish was spotted sitting in an economy seat while traveling on a commercial flight.

One excited fan with the username @williambossanova took to TikTok and shared a recording of the 21-year-old seated rows ahead.

The pop music sensation – who recently showed off diamond grills – was easily visible in the clip as she wore a gray beanie with white-outlined blue stars all over.

Corroborating that it was, in fact, Billie who the eagle-eyed passenger peeped, the songstress later appeared on her Instagram page in the look.

Using the Stories feature, the Bad Guy singer shared a selfie taken in her seat as sunlight poured onto her face.

The overhead cabins of the aircraft were visible in the background, and she linked the Future song I Serve The Base over the image.

Eilish went makeup-free and her blue eyes sparkled as the sunlight hit them.

The fan who posted the sighting on social media has gone viral, with the clip viewed close to 900,000 times.

The caption of the post read, ‘Pov: you’re in a plane with Billie (Still cant believe wtf just happened).’

And across the recording was a similar caption that said: ‘POV: you see Billie Eilish for free.’

It was not noted which airport the superstar boarded the plane, or where the flight was headed.

Last week the Gen-Z favorite took the stage at Sziget Festival 2023 in Budapest, Hungary.

She flaunted her fun sense of fashion as she performed in a black Jersey with white and red accents, red athletic shorts, and black tights.

Fun fashion: The entertainer recently performed at at Sziget Festival 2023 in Budapest, Hungary

Diamond grills: The star flaunted her look in a close-up selfie as she sported a graphic T-shirt and an orange hat

One of the Grammy winner’s recent Instagram posts showed her with new diamond grills adorning her teeth.

The photos prompted a debate among her 110 million followers, as some thought the accessory was cool, and others disagreed.

Social media users wasted no time taking to the comments section to offer their contrasting takes.

One fan defended the grills, and wrote, ‘It’s obviously Hip-Hop influenced. She’s always done the big clothes, but let’s not stray from the fact that the jerseys, Jordans, and grills are common hip-hop troupes.’