Thursday, September 16, 2010 8:14am ET by  

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Katy Perry performs at former school

Katy Perry performed a free concert for students at her former school in California this week.

The singer returned to Dos Pueblos High School near Santa Barbara, on Tuesday afternoon (September 14).

2,000 students and staff watched as Perry took to the stage, which was filled with smoke machines and giant lollipops.

Before the show, she was advised by staff that she had to be "school appropriate."

During her performance the singer declared, "Maybe you don't know, but I went to high school here. I was on this very stage many a lunchtime. I was such a show-off."

Perry continued, "High school can be tough, but you know what? You're stronger than that."