What American idol runner-up stars on Smash?
Katharine McPhee Katharine Hope McPhee (born March 25, 1984) is an American actress, singer and songwriter. She gained fame in May 2006 as the runner-up on the fifth season of "American Idol."
Lee Soo-jung Crystal Yi, better known as Lee Soo-jung and Chai (born in 1993) is an American singer of Korean descent who is currently signed under Antenna Music. She was the winner of SBS's K-pop Star 5 in 2016.