Smallville: Season 7, Episode 13

7 - 13: Hero

Pete is working as a roadie for OneRepublic and develops super-stretching powers after chewing kryptonite-tainted gum. He ends up rescuing Kara and decides to go public with Jimmy's help. However, Lex puts pressure on him to steal Kara's bracelet from Lionel, by threatening to reveal Chloe is a meteor freak.