The Coach's Signatures
It started with Seal's penchant for wearing yellow neon nail polish. Then Joel Madden was never without a toothpick in his mouth or hand. Delta Goodrem wore thick-framed black glasses during her coaching sessions, and before we knew it all the items had Twitter accounts (@sealsnails, @JoelsToothpick and @DeltasGlasses). Just when it seemed like Keith Urban was left out, he stood up while giving commentary to a performance (via satellite from LA) and gave everyone a glimpse at his Calvin Kleins. That led to the Twitter account @KeithsUndies.