there's this song from the 50's or so like.....?

Question

it's talking about this girl when she was small she did something in kindergarden. and there's this line like"and look at you now". and somthing like"I know because you're cute" or something like that. I really don't remember all the words

Answer 1

There was record first recorded in the 30's called:
"You Must Have Been a Beautiful Baby"
Recorded by various artists throughout the generations.
Bing.
B Darin

You must have been a beautiful baby
You must have been a wonderful child
When you were only starting to go to kindergarten
I bet you drove the little boys wild.
And when it came to winning blue ribboms
You must have shown the other kids how.
I can see the judges' eyes as they handed you the prize
You must have made the cutest bow.
You must've been a beautiful baby
Cause baby look at you now

Answer 2

Based on your description, it sounds like "Calendar Girl" by Neil Sedaka.