January Jones recently turned up on 'The Tonight Show with Jimmy Fallon' in a sexy black jumpsuit but no underwear.
The 'X- Men' star wore a revealing, yet classy, black jumpsuit for the visit with matching heels and the plunging neckline ensemble showed off her major skin with cut-out detail placed strategically down her leg, Daily Star reported.
She completed the look with simple makeup simple with a touch of light blue color.
