Fifty Shades of Grey Matter - S2-E11
Trivia: Liv listens to an audio erotica novel which is read by actress Kristen Bell. Liv replies "I always felt a kind of connection to her." iZombie was created by Rob Thomas, who also created the series Veronica Mars which starred Kristen Bell.
Trivia: When questioning the murder suspect Liv notices and comments that he recently visited Hearst College. This is the same fictional college that was featured in Veronica Mars (creator Rob Thomas also created this show).
Real Dead Housewife of Seattle - S2-E3
Trivia: Liv says to her roommate "a long time ago we used to be friends," talking about her former roommate Peyton who is now back in Seattle. This is a direct homage to the lyrics to the theme song from Veronica Mars (created by Rob Thomas, who also created iZombie).