Video: Lady Gaga suffers concussion after being hit over head with pole during New Zealand concert Video clips posted on YouTube show a backup performer striking Gaga with the set prop while removing it from the central stage. Gaga, holding a mock machine gun, staggers and rubs her head before briefly leaving the stage. Despite the injury she continued the show, part of a world tour. Gaga's makeup artist Tara Savelo later confirmed on Twitter that the singer had suffered a concussion.