How can I get a bigger booty?

Hi:) I'm 16 and people tell me I have a big butt but I personally don't think so. What can I do to make it bigger. Do I need to lose weight because that's what I'm doing right now. I weighed myself this morning and I'm 5'11 and 142 pounds and 20% body fat
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Also what does it mean wen someone says your bony?
How can I get a bigger booty?
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