January Jones Hot Look on The Tonight Show Is The Best Revenge; January Jones Underwear Stays Home

January Jones showed off her hot new look on the Tonight Show last Friday. The Mad Men star is in town with the rest of the cast promoting the next season.

January Jones turned up on The Tonight Show with Jimmy Fallon on Friday, March 28, to talk about the new season, her new movie and the revenge she has taken on her ex-boyfiends. What didn't show up for the Tonight Show was January Jones' underwear.

Mad Men actress January Jones made it apparent that she wasn't wearing any underwear during her appearance with Jimmy Fallon by wearing a revealing, lacy black jumpsuit with matching heels. Jones' neckline plunged and showed plenty of skin with cut-out detail placed strategically down her leg.

While everyone was hypnotized by January Jones' ensemble, the actress told Jimmy about a prank she pulled on her ex-boyfriend from high school. The ex-boyrfiend is a realtor now. Jones tricked him  into thinking she was planning to buy a $1 to $2 million home from him.

January Jones and Mad Men costars are in New York for the show's upfront presentation.

January Jones who didn't reprise her role as Emma Frost for X-Men: Days of Future Past, is currently working on her latest film, the 2015 thriller, Good Kill, alongside Ethan Hawke. The film, directed by Andrew Niccol, has a tentative release date for 2015.