Each pop star perfume commercial is like a snowflake -- they are all inane in their own special unique way. In Justin Bieber's spot for Someday, he smells a young lady's neck five times while whisking her into the clouds for an airborne piggy-back ride. Britney Spears has made so many hilarious fragrance ads, it's hard to nail down which is the most fantastical (perhaps the one where she announces, "I choose my own destiny"). Now Christina Aguilera has entered the race with a 21-second advert for Secret Potion (via Idolator) where her perfume spritzer acts sort of like those cans of spray-on hair. It's magical!