Katharine McPhee 'Smash-es' Into 'The Voice' (Video)

12:32 AM 6/29/2011 by Jethro Nededog Ruh roh, is Katharine McPhee crossing to the enemy's side? The American Idol Season 5 runner-up dropped by Idol's rival singing competition The Voice on Tuesday to talk about her new series, Smash , plus she announced she would be doing her own version of one of the coaches' hits.