This week, the girls of The Hills watch their lives take a dramatic turn for the worse. Audrina and Lauren find their friendship at risk again when Audrina accuses Lauren of hooking up with Justin. Holly misses her sister, and Heidi realizes that Spencer hasn't been completely honest with her. Were you paying attention to the gut-wrenching moments? Find out when you take our quiz.

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The Hills: Episode 16, "You Did This"

What is Spencer doing when Holly stops by his apartment?