If a girl is 150 pounds 5'4 is she what the average american weighs

The average American woman is fat and this is also fat.

Depending on body build and age as well as a few other factors she is probably a little plump. Maybe pleasingly if it's in the right places porportionally. However, the average 5'4" American woman weighs closer to 170lbs. I blame this fat desire/acceptance to the fad of phat asses and desire to have double d chest or bigger. Doesn't matter if you have friction burns on your inner thighs or can't stand up straight because of back pain.

If you want investment advise, put your money in the breast reduction plastic surgery area. 10 to 15 yrs there are going to be a lot of women who have problems keeping their boobs out of their belts or arm pits depending on position, and when they walk the cheeks of their ass is going to hit them in the back of the knees. Gravity is cruel. I think they call this hind sight or unsightly.

I'm not trying to fat shame anyone, I'm just talking from experience. I would highly suggest you weigh or look the way you want and are happy with. Don't look, gain, or lose, because of a fad or public opinion. Be happy with yourself and if you have to take in a second opinion, make it a doctor's advice of what's healthy for you.