Some of her stage costumes and outfits may be a little nauseating but surely even she is used to them by now.

Lady Gaga surprised fans when she vomited four times live on stage during a concert last week in Barcelona, Spain.

The pop performer, 26, had just begun to strut down a set of stairs on to the main stage area when her sickness kicked in.

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Edge of sickness: Lady Gaga was seen vomitting on stage as she performed in Barcelona, Spain, on Saturday night

Gaga, who was dressed in a typically revealing outfit, halted at the top of the steps and was seen leaning over the edge with her back to the audience.

After following the recent example of Justin Bieber, by throwing up, she attempted bravely to continue with her dance routine as she began to perform of Edge Of Glory.

However, she was unable to carry with the routine without stopping again to vomit over the barrier behind her.

Keeping up appearances: Gaga didn’t stop dancing as she tried to act like nothing was going wrong

Ever the professional Gaga valiantly did more dance moves in between throwing up even more while her male dancer tried his best to obscure the view by staying in front of her.

The Poker Face star held up her own hair as she avoided getting any mess on herself before standing erect and bouncing across the stage to entertain the audience.

It is not the first time the performer has fallen ill on stage as she was forced to halt a concert in Romania back in August to vomit off camera.

It’s a cover up: Her male backing dancer took centre stage as he tried to cover up her sickness

When she returned to the stage she said: ‘I went backstage and vomited, and I did not want you to see this… It happens to me sometimes.’

Things only got worse for the singer as some of the 25,000 strong crowd poked fun at her over her recent 25lb weight gain.

Gaga was showered with sausages but took the jibe in her stride as she tweeted after: ‘SPAIN, you took the p*** outta me. Thats some hard bodied pop stuff. I’ll never forget tonight Barcelona. FOREVER’. (sic)

Back to normal: Lady Gaga appeared to be feeling better as she attended her perfume launch after show at Harrods in London, on Sunday

Poker face: The pop star changed into a fur outfit after she arrived at the launch in a tight black dress