McPhee, who was runner-up in the fifth season of the reality series "American Idol," has been seen on film and television in "The House Bunny" and "CSI: NY," among others. She released a self-titled debut album and a second album entitled "Unbroken."
To learn more about her character on "Smash," read the Playbill.com feature that introduces you to the characters of the series.
"Smash" airs Monday nights at 10 PM ET on NBC.
To watch the interview with McPhee, look below: