Lady Gaga throws up on stage during concert

London: Pop sensation Lady Gaga threw up on stage while performing at a concert in Barcelona.The 26-year-old singer took her Born This Way Ball concerts to Barcelona, but she struggled throughout her performance and was caught on camera throwing up mid-song, reported Daily Mail.[caption id="attachment_483459" align="alignleft" width="380"] Lady Gaga. Reuters[/caption]Gaga walked to the end of the stage during a rendition of her hit track The Edge of Glory and turned her back to the audience as she stood behind a dancer to vomit several times.After the gig, she wrote on Twitter, "Spain, you took everything out of me. That's some hard bodied pop stuff. I'll never forget tonight Barcelona. Forever."Few weeks ago teenage pop star Justin Bieber had also suffered similar problems as he kicked off his Believe tour in Arizona.PTI