How Much Should A Kitten Weigh At 3 Months?

My kitten is starting to get a little chubby and it’s getting annoying.

How much should my cat weigh at 4 months? I need some help on how much my cat should weigh at 4 months old. She is about 15 lbs right now and she eats like crazy! My mom bought her from the litter I got her from, so we don’t know anything about the parents…any info would be great!!