Cheeky Lisa Hague took to Twitter to tell her 21,500 followers: “Ooooooh goal 5 hit the C spot.”
However, reminding those who had something else on their mind, she added: “(The Celtic spot) dirty minded peeps lol.”
One Twitter user encapsulated the mood by telling Lisa: “Saucy.”
Her comment came as the Hoops came racing out of the traps with striker Leigh Griffiths scoring from the spot in the 17th minute.
Further goals from midfielder Tom Rogic and Patrick Roberts had the game finished before the interval.