was left red-faced on live TV on Thursday - after forgetting the name of her leading man in Broadway musical "Chicago
The singer-turned-actress made her Broadway debut as Roxie Hart on November 30.
And, after almost a month of performances, Simpson-Wentz was tongue-tied when asked to recall her co-star Brent Barrett
, the actor who plays Billy Flynn, during a segment on "The Today Show".
Embarrassed, the star appeared desperate to remember the name, but instead excused herself: "Oh my god! Names, names, names, names, names."
The 25 year old has already tested her popularity backstage - castmembers reportedly complained she barricaded her family from the rest of the cast in "a makeshift VIP section", at an after-party for her debut.
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(This news article provided by World Entertainment News Network)