Blackhurst has performed extensively in cabaret and musical theater, including off-Broadway in the 1996 musical Radio Gals. She has portrayed Ethel Merman in a tribute show Everything the Traffic Will Allow and in concerts and played Ado Annie in a 2002 BBC Proms concert version of Oklahoma! Her other onscreen credits include a small role in Law & Order: Special Victims Unit and as Shelby Cross in The Onion News Network.