Katharine McPhee gained fame from working with Susan Marshall in what season of American Idol?
Susan Marshall (musician):  She is best known for her work with Mother Station, Lynyrd Skynyrd, Lenny Kravitz, The Afghan Whigs, Primal Scream, North Mississippi Allstars, Lucinda Williams, Ana Popović and Katharine McPhee. Katharine McPhee:  She gained fame in May 2006 as the runner-up on the fifth season of "American Idol."
fifth season