Over the course of its nine-year run, One Tree Hill saw its fair share of memorable storylines. Who can forget Lucas' (Chad Michael Murray) face when a dog ate Dan's (Paul Johansson) transplant heart? Or that time the girls stopped feuding to deliver the ultimate Spice Girls tribute during that epic graduation party?

Unforgettable moments like those made the series quintessential viewing during its exhilarating reign on The WB and eventually The CW in the aughts. However, those bold storylines often left us wondering if we were watching a teen drama set in North Carolina or a Lifetime movie. In celebration of those major similarities — and because OTH stars Hilarie Burton, Danneel Ackles, Antwon Tanner, and Robert Buckley are now actually starring in their own Lifetime movie, The Christmas Contract — we put a couple of our favorite OTH alums to the ultimate test to find out whether or not they could tell the difference.

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Check out the fun trivia game in the video above to see if Burton, Ackles, Tanner, Stephen Colletti and Tyler Hilton can differentiate between Lifetime movie plots and OTH storylines, and be sure to catch The Christmas Contract, part of Lifetime's "It's a Wonderful Lifetime" holiday lineup, when it airs Thursday, Nov. 22 at 8/7c. Then stick around to catch several cast members reminisce about their days at Tree Hill High in 'Tis the Season: A One Tree Hill Cast Reunion, hosted by Paul Johansson, at 10/9c.

Photos: One Tree Hill: The Cast's Favorite Episodes

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