Girl-magnet Justin Bieber is up to his tricks again, but this time good ones, as far as a California high school is concerned

The boy singer crashed a Los Angeles prom to bust a move with several of the goggle-eyes teens. He was on his way to Jim Henson studios at the same location when he spotted the hubbub for the Chatsworth Charter High School prom. The Biebs, decked out in black Fedora and brown shirt, hopped out of his car and popped in to make the scene while the girls — and some guys — screamed in excitement, reports Hollywood Life.

Chaos erupted and Bieber eventually dipped out, still smiling.

Who wasn't so happy about the surprise visit? School administrators apparently, reports TMZ. They claim he bullied his way in, and his run-away charisma put students at risk.

"His entourage pushed past the school's security to gain access to the dance floor," said a spokesman for the Los Angeles Unified School District. Officials were worried that they wouldn't be able to control the crowd,

Bieber's people responded that it was "unfortunate they're trying to make this a negative thing. It was awesome for all the kids," a spokesman added.

Ok, so school district officials conceded it was a "once in a lifetime experience."

Prom crowd goes wild.