Who has ever met a celebrity (or have there autograph)?!?!?!?

I have- AND i have their autographs. Isnt it AWESOME!!?? They are soooo different to wat u see of them on television. like The Veronicas; i knew they were short but when i met them- OMG they were shorter than me- and im a teen at 150cm!! same with when i met the olsens- Mary Kate is 4 ft 11!!!!!