In 1979, she sang the national anthems for both the United States and Canada at the Major League Baseball All Star Game in Seattle, Washington.

Her credits include Les Misérables (both on Broadway and in the national tour), Jerry's Girls (a revue of Jerry Herman songs co-starring Carol Channing and Leslie Uggams), Beauty and the Beast, Starlight Express, Meet Me In St. Louis, The Wizard of Oz, They're Playing Our Song, and another celebrated Annie in Irving Berlin's classic, Annie Get Your Gun.

McArdle once again starred in the musical Annie with the North Carolina Theatre Company, although she portrayed the role of Miss Hannigan, at odds with her former character.

McArdle returned to Annie at Musical Theatre West in Long Beach, California, as Miss Hannigan from October 29 - November 14, 2010.

[4] On April 2, 2014 Oceania Cruises[5] announced a new "Life in the Theater"[6] series featuring McArdle, for select sailings starting with a voyage aboard Riviera on October 29, 2014.

[8] In November 2021, it was announced that McArdle would be playing Eleanor Roosevelt in NBC's Annie Live!, but she later had to drop out due to a family emergency.