When you meet someone you are very fond of, like a celebrity, movie star, etc. and you get completely overwhelmed, paralyzed and/or speechless by the experience.
I've just bumped into Scarlett Johansson tits at Starbucks. I'm still starstruck!
I got really starstruck when I saw George Michael on that public toilet.
Mr George Lucas made a surprise appereance at the Star Wars Convention last night. We all screamed. Everybody was soooo starstruck!
when you are so madly in love with a superstar that you even make them a fake myspace and put yourself as their top friend and have "them" post personal comments on your page
people are so starstruck over adam brody they have about a hundred myspaces pretending to be him