Beyonce Goes "High School Musical"

5/14/2008 7:30 PM PDT BY TMZ STAFF
For the love of Sharpay Evans! Can someone please tell Beyonce she is not Ashley Tisdale in "High School Musical"?

The married 26-year-old showed up to dinner in NYC -- after attending a Kanye West show, mind you -- dressed like a spoiled teenager on any Disney kids' show. She's just being Miley!

Jay-Z better knock some sense into her.