How can I gain weight quickly?

Im 5'4 and 105 lbs and I'm 16 years old. I pretty much like the way I look , but sometimes I wish I could weigh more and at least have a bigger ass and be "THICK".. because my face is pretty and I have titties, but sometimes I feel my body {since its smaller} makes my head look kinda big, lol... any advice

Here's some info: http://www.wikihow.com/Gain-Weight

If you think your pretty then why change? Your probably beautiful, and you don't need to gain weight, nevertheless,
If you want to gain muscle, then try eating more protein and weight lifting a couple times a week. It won't make
you bulky, just do more reps (repitions) and less weight, like 5-10 pounds should be enough. Squats will tone
and muscularize your booty. Breast on the other hand, are something that develops on their own...sorry...lol
You don't need to change for anybody, but like I said, if you want to, there are a couple of tips...the internet is a
big helper for finding more info.

girl I ant never heard of that one ,but you can eat lot's and lot's of fat!!!!!

starch... bread. eat allot of eggs and bread and meat.

ARE YOU STILL AROUND?? **I THINK I HAVE WHAT YOU'RE LOOKING FOR**

huh?