How much weight can I lose in 6 months? I really want to be fit so I can wear this gown on New Years?

Anonymous
I will exercise properly and eat well and drink lots of water and I won't have junk. Just one cheat day a month (pizza). I am in desperate need to be thin. Will I be able to lose around 25 kgs?
How much weight can I lose in 6 months? I really want to be fit so I can wear this gown on New Years?
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