Casey Wilson portrayed Rachael when she was on *Saturday Night Live*, which prompts Rachael to ask the *Happy Endings* star if she'd fill in for her now and then. "Maybe I could step in and say, 'Yum-o!' or 'Delish!'" Casey jokes. "I can't cook a thing for you, but I'll try my best!"
Watch the video above to hear why Casey left Post-it notes for herself about Barbra Streisand, and how she's addicted to karaoke!