One teacher is a “Toxic” Britney Spears fan!

They were fired after bringing a karaoke machine to class.

They belted out Britney Spears’ “Toxic” and another song, assumed to be a Lady Gaga hit.

They were immediately let go after first period.

This happened at the Bowie High School in Austin, Texas on Friday.

A student recorded the bizarre performance and posted it online.

One rumor alleged that the teacher was arrested; the district says this is false.

They say the teacher was let go because karaoke performances are not “following best practices.”

Apparently, the substitute is already working at another high school, most likely without his karaoke machine.