American pop singer Billie Eilish was left frustrated during one of her Sydney concert last week when a technical glitch ruined one of her moody ballads. 

The 20-year-old stopped midway through her performance of When The Party’s Over when a bright white spotlight on her changed to flashing red lights.

The Bad Guy singer looked confused as she turned around to look at the offending stage visuals.

Billie Eilish gets thrown off after wrong stage visuals come on

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American pop singer Billie Eilish was left frustrated during one of her Sydney concert last week when a technical glitch ruined one of her moody ballads

A TikTok user attending the concert shared the moment of the glitch and was heard saying ‘What the f**k?’ in the background.

The TikTok clip, captioned ‘the moment when someone definitely got fired for f***ing the mood with the wrong visuals’, has gone viral, reaching 1.2million likes and over 7 million views.

Billie kicked off the Australian leg of her tour last Tuesday evening at Sydney’s Qudos Bank Arena.

She then went on to play in Brisbane over the weekend and on Monday night and will play four shows in Melbourne from Thursday.

Billie will then fly to Perth where she will play two shows before wrapping her Happier Than Ever world tour.

Meanwhile, Billie went on a wild spending spree in Newtown prior to her stadium concerts, reports Emerald City.

A TikTok user attending the concert shared the moment of the glitch and was heard saying ‘What the f**k?’ in the background

She was spotted at Storeroom Vintage in Newtown where she picked-up a number of high-end items.

She reportedly left with boxes of clothes with items including a Louis Vuitton handbag and Fendi purse.

The star also purchased a maxi skirt reworked from pants, and an oversized Carhartt jacket.

During her shopping spree the star was forced to circle the block a number of times due to the paparazzi, the publication claims.

She was accompanied by her mother, Maggie Baird, and support act Dora Jar.

Billie also documented her shopping expedition on Instagram, uploading a gallery of photos showing herself sitting in piles of clothing on the ground.

The vintage store is believed to have links in music and fashion with Ben Simmons, A$AP Rocky and The Kid Laroi, all fans.

While in Sydney, Billie also filmed a mystery project with New Zealand DJ Zane Lowe in Alexandria hours before she took to the stage.

Billie kicked off the Australian leg of her tour last Tuesday evening at Sydney’s Qudos Bank Arena