The pop star battled on with her performance, but carried on vomiting, as a backing dancer tried to cover her from view.

She then told the crowd: "I went backstage and vomited, and I did not want you to see this ... It happens to me sometimes."

The 'Bad Romance' hitmaker took the incident in her stride, posting a link to it on her twitter page, writing: "Was praying nobody saw but actually its quite a good laugh if u need one! Check out Lady PukeGA doing Swan "Vomit" Lake (sic)."

She also showed spirit when fans poked fun at the singer's recent weight gain at the same show, throwing sausages on stage at her.

She wrote: "SPAIN, you took the p*** outta me. Thats some hard bodied pop stuff. I'll never forget tonight Barcelona. FOREVER' (sic)"

Gaga wasn't the only one to narrowly escape the meaty missiles, as her father Joe Germanotta - who was watching from the side of the stage - was almost hit too, although he was happy to be pelted with pork treats.

He tweeted: "In Barcelona someone threw sausages on stage and almost hit my head. I picked them up, they were for me."