When it comes to making appearances on the The Late Show with David Letterman, you can consider Tina Fey a veteran. She's been on the late night talk show 20 times.
Since Letterman is retiring, Fey vowed it would be the last time she would wear a fancy dress on a talk show again.
Fey talked about how much effort it takes to fit into formal dresses and compared her form fitting shapewear as medical contraptions.
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Letterman helped her remove her dress and underneath read "Bye Dave!" on the front and "#Last Dress Ever" on the back.