Emily Sheath Dress, $498 at saks.com
If you keep up with the show, we've got a prediction for you: Sarah might become a regular on the show. Think about it - Sarah's character mentioned she'd attended a St. Patrick's Day party and left early and last episode, Ted said his future wife was at a St. Patty's party he went to, but he didn't know it at the time.
Catch a new episode tonight on CBS.
photo via tv.com