For that performance, she wore a skintight jeans as mentioned in the song.

At the beginning, she was singing a capella inside a flashing red heart. Then she ran to the center of the stage to join her dancers for some choreography. Finally, the dancers was leaving the singer solo and a shower of fireworks sprinkled over her. To end up the performance, she screamed : "Welcome to my teenage dream come true, the Teen Choice Awards 2010 !".

In other words, this was an array of extras dressed as high school stereotypes : during the evening, with her co-hosts from Glee, she played to a recurring theme of revisiting high school and being in a Teenage Dream, which involved jock, nerd or cheerleader costumes.