Hot Topic was a store featured in the Season Twelve episode, "The Ungroundable".
Background[]
The store sold clothes, accessories and more to Vampire wannabes at the South Park Mall. It was there that the "vampires" transformed Butters Stotch into one of them. The Goth Kids along with Vampire Butters burned it down to break his "curse" and to stop people from confusing them with the South Park Vampire Society. Burning down the "Vampire Lair" would cause all the Vampire Kids to return to normal. But according to Butters, it used to be Banana Republic.