"Perfume," Britney Spears' new single off "Britney Jean," is here. "I'll never tell, tell on myself, but I hope she smells my perfume," Spears sings, taking the role of a woman concerned that her significant other is still hung up on his ex-girlfriend. Spears, who has called "Perfume" one of her favorite tracks on "Britney Jean," co-wrote the song with Sia. Smell Spears' latest below; "Perfume" is available for purchase on Monday morning.