Will losing 20-25 lbs make a difference in my appearance?

I was a really cute little girl, but after my dad and grandpa passed away, my mom and I kind of lived on junk food and tv dinners for a while. So ever since I was 7 I have been overweight. I don't feel as if I am pretty at my current weight. I look back at my pictures and the only ones that I really think I look good in are when I am 5 or younger lol. I am 5'6' 150 lbs. My ideal weight is about 130. Would losing weight make a difference and make me possibly more attractive? Also, once an overweight person loses weight, do people always think of them as overweight?
Will losing 20-25 lbs make a difference in my appearance?
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