Even when braving the trials and tribulations of young love — e.g., getting a quickie Las Vegas marriage annulled 55 hours after it happened — Hollywood pop princess Britney Spears has to put her best smile forward, and she does it with GoSmile tooth whitener, which ensures she’s always flashing pearly white, sparkling teeth, even if she’s not feeling all that sparkly. Spears, Heather Locklear, and Christie Brinkley are but a few famous faces who rely on this dentist-developed whitener, which promises to make teeth six shades whiter in two weeks. And now, to make it even easier for jet-setters everywhere, there’s GoSmile On the Go. Packaged in a nifty silver case about the size of a deck of cards, it’s filled with seven individual tubes of whitener. Oh, and you have our solemn promise that you won’t end up like Ross on Friends. www.gosmile.com