7. "Teenage Dream"
Released: July 23, 2010
Chart Peak: Number One (Two weeks)
According to Perry's songwriting partner Bonnie McKee, this shimmering fantasy of self-conscious naïveté went through several conceptual reworkings before it met the approval of her production team. At various stages, it was an unsexy Peter Pan homage, a jokey tune about growing up to be a "mom in a minivan" and an extended clothing metaphor about sex.