Teen pop singer Justin Bieber has never been shy about product placement. With these singing toothbrushes, he can tell all his fans to "Bite me!" The brush comes with two buttons. One triggers "Baby," while the other triggers "U Smile." The song plays for two minutes, the dentist-recommended timing for scrubbing your pearly whites. What's extra goofy about the brushes is that they come in both junior and adult sizes.