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"&lt;strong&gt;Katy Perry&lt;/strong&gt; burned one of her former classmates during a &lt;a href=\"http://www.tmz.com/2010/09/14/katy-perry-performs-dos-pueblos-high-school-free-students-rock-santa-barbara-goleta/\" target=\"_blank\"&gt;&lt;strong&gt;surprise performance&lt;/strong&gt;&lt;/a&gt; at her old high school yesterday ... calling out some dumbass who ignored her during her pre-girl-kissing years.&lt;br /&gt;&lt;br /&gt;{{tmz_video_0}}&lt;br /&gt;It all went down at Dos Pueblos High School near Santa Barbara, CA -- where 25-year-old Katy claims she spotted and then singled out the \"most popular kid\" in her class -- then rubbed in the fact that he \"never wanted to date\" her. &lt;br /&gt;&lt;br /&gt;Katy then poured salt in the wound by screaming, \"What's up now?\" ... and followed it up by dedicating her next song to him ... titiled, \"You're So Gay.\"&lt;br /&gt;&lt;br /&gt;BTW, Katy started off the show wearing a cheerleader outfit ... then stripped into something more revealing ... and yes, we left that part in.&lt;br /&gt;&lt;br /&gt;&lt;!-- relatedlinks --&gt;"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.tmz.com/2010/09/15/katy-perry-high-school-performance-dos-pueblos/3/>