Children's Choir

Upon seeing the local children's choir visiting the complex for their annual concert:

"They are the Down Syndrome Choir."

They're actually just kids from the local elementary school.

Surgery

After hearing about a friend's impending surgery:

"She used to be so fat!"

Feet

Upon seeing my feet, sans shoes:

"You have such little feet!"

I'm a size 10.5, thank you.

...

Dancer?

Upon seeing me for the first time in 2 years:

"Your waist is so tiny! Are you a dancer?"