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Her PA Gareth Varey was headbutted after reacting to a man who made derogatory comments about the singer, the Daily Record claims.
A supposed witness recalled: "There was a lot of talk about one of Tulisa's group being headbutted. They all wanted to sort it out before take-off.
"Tulisa stayed back with a girl and a guy, where they continued arguing their case with staff.
"She was desperately trying to diffuse the situation but the argument was getting heated.
"Tulisa didn't want to leave the matter unresolved as, she said, they would be 30,000ft in the air. They didn't want anything else to kick off."
Meanwhile, a spokesman for the X Factor judge confirmed: "There was an argument at the airport but no further action is being taken."
Contostavlos was on her way back to London following her performance at In: Demand Live at Glasgow's SECC on Sunday.
Watch the music video for Tulisa's 'Young' below:
