What's the stupidist thing you've said to someone,

Today my friends and I were discussing a lady who has recently completed her gender reassignment surgery, she has returned to her job and looks awesome then I innocently but completely stupidly said,

  I admire her, you'd need balls to do that, everyone stared at new and said I was being cruel, it then dawned on me what I'd said, I was so embarrassed,

OK heal my embarrassment please by sharing  yours look,