Will I get fat eating 1 pizza?

mate I just ate a whole box of krispey kremes, I usually eat around 3500 calories a day to bulk up my physique, ive easily eaten 10 000 today, but it doesn't matter because I don't do it everyday, and neither should you do it everyday, just eat the damn pizza

barely any damage (on a scale of 1 to 10 where 10 is really bad damage, I'd rate you at 1). I actually recommend having such a meal (high-carb cheat meal) every 10 days as extended periods of dieting result in the decrease of leptin levels, a hormone critical for fat loss.

No damage but make sure you eat 3 balanced so you don't eat a whole pizza oh and take your vitamins and try on clothes, play fashion show w/ music and try on your loose stuff and tight items, clothing and a scale is the best indicator. Pls. keep in mind that you are a growing girl. 3500 calories is 1 pound the pizza was at a minimum made you gain 1 lb.

You'll look like an alien craft

will you gain weight from eating a large pizza? No. but you will if you keep doing it on a regular basis for a good few weeks. (if you want to eat a large pizza to yourself now and than, go for it but don't do it too frequent)

Is the pizza 20 feet long? No? Probably not then lol. One meal won't make you fat.