What American idol runner-up stars on Smash?
Bombshell (Smash): "Bombshell" is the fifteenth episode and first season finale of the American television series, "Smash". Katharine McPhee: Katharine Hope McPhee (born March 25, 1984) is an American actress, singer and songwriter. Katharine McPhee:  She gained fame in May 2006 as the runner-up on the fifth season of "American Idol."
i don't know