The Young and the Restless' Justin Hartley (Adam Newman) and Melissa Claire Egan (Chelsea Lawson) are on-screen lovers and real-life friends, but how well do they really know each other? The two took a fun co-star quiz to find out.

Hartley and Egan were challenged to answer questions about each other's current lives and histories, ranging from whether or not Justin eats cheeseburgers to how many tattoos Melissa has. How well did the co-stars do when it comes to knowing random facts about each other? Watch the video below to find out.

Were you surprised by any of Hartley and Egan's quiz answers? What questions would you ask the co-stars about their lives? Share your thoughts in the Comments section below, on our message boards, or by submitting Feedback.

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