13yrs old in the Posh seats with my mates entire family (about 8 of them) all Chelsea ST holders. I cheered every Spurs goal, sang every Spurs song, went crazy at the end. When your 13 no one tells you to pipe down ha ha.
Only downside was, I was never invited back, which wasn't a massive issue as the season before was the first year I started to take myself to The Lane. But up until then I'd been taken by this family to almost every Chelsea home game since I was about 6yrs old. Easily saw three or four times more Chelsea games than Spurs games back then.