Bangbang. According to the film official website, the background music is Bang Bang. "Despicable Me" tells the story of Gru's plan to steal the moon, only to find that the shrinking ray gun that stole the moon was taken away by the new thief Victor. In order to get back the shrink ray gun, Gru decided to adopt three orphans and use them to sell cookies in Victor's heavily guarded castle and tell the story of theft.