<P> Harris hosted Smoking Gun TV in 2004, and has made multiple appearances on such VH1 documentaries as I Love the' 80s, I Love the' 90s, and Best Week Ever . On ABC's Cougar Town, she played Shanna, a woman that the network describes as being the "nemesis" of Jules . Also on ABC, she made a guest appearance in the Modern Family episode "Caught in the Act" as a Amelia, a restaurateur and mother to a playmate of Lily Pritchett . </P> <P> In March 2014, Harris began a new role in the very short - lived series Surviving Jack with Chris Meloni . In March 2015, Harris was cast as Linda, Lucifer's therapist in the FOX television series Lucifer . </P> <P> Her film credits include roles in Best in Show, A Mighty Wind, For Your Consideration, Kicking & Screaming, and Daddy Day Care . In the 2009 comedy The Hangover she plays Melissa, girlfriend to Ed Helms's character Stu . She previously co-starred with Helms on The Daily Show . She plays the mother of the main character in the film Diary of a Wimpy Kid (2010) and its two sequels . </P> <P> Harris' TV commercial work includes ads for Dinty Moore, Avis, Expedia, Quaker Oats, T - Mobile, GEICO, and a Super Bowl commercial for the 2010 Census . She is the voice of turtle Karolyn Slowsky in the Comcast Slowskys television commercials . </P>

Who plays stu's girlfriend in the hangover
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