BARCELONA, Spain -- Justin Bieber isn't the only pop star to blow chunks during a performance this month.
Lady Gaga vomited on stage during her show in Barcelona, Spain this past weekend, as seen in video posted by TMZ.
Gaga was performing her song, "Edge of Glory," when all of a sudden she bent over and puked -- not once, not twice, not three times -- but four times.
But the puking didn't deter Gaga. She stays on course and continues to dance with her partner. However, many are accusing Gaga of lip syncing due to her voice not wavering during the continuous vomiting.
Sources close to Gaga say the singer was suffering from the flu, but didn't want to cancel the show.
Watch the video below: