Goofs

The list of resolutions Ingrid first holds up to Paul is different from the one Paul reads the second time.

Elise starts her appearance as backup singer for Jensen with black nail polish. In her rendition of Auld Lang Syne she is wearing white nail polish.

During the speech from Sam's mother, she is holding the dog iPod. Switching between shots she is holding him up to her shoulder, while in the next shot she is holding the dog in her arms.

The Marriott Marquis Theatre marquee switches back and forth between the Donny and Marie Osmond Christmas show and the musical Wonderland. The Osmond Christmas show closed January 2, 2011 and Wonderland opened April 17, 2011.

The chocolate that Laura spits out into the kitchen cloth disappears when she turns around to face Jensen. The cloth is shown neatly folded beside her instead with no signs of the chocolate.

The movie is supposedly set at the end of 2011 going into 2012 (to coincide with the movie's release). However, in the beginning of the film in Times Square, you can see that the countdown year set is 2011. This would not be true since the countdown always shows the forthcoming year. This error is likely because the film had real filming on 12/31/10.

Driving the RV cannot be done with the living room slide out as shown in the movie, they would be driving down the highway with 2 feet of the RV sticking out the driver side.

When Sam crashes his car into a snow drift, the airbags deploy individually, several seconds after impact, and they stay inflated. In an actual crash, they'd deploy instantly and simultaneously then deflate.

When the reporters are trying to find out what will happen with the ball drop a reporter asks in Spanish about why the ball isn't moving and a man answers "I'm sorry, I don't speak Spanish, I'm from Ohio." However, when she relates this back in Spanish to a recorder she says "He says he doesn't speak English and that he's from Ohio."

In the hospital, Tess is seen touching her stomach - it is obviously padded, as a normal pregnant stomach would not be that soft.

When Hailey runs away from home and Kim follows her to the subway, the crew and camera can be seen in the reflection of the subway train as it pulls away.

When Ingrid (Michelle Pfeiffer) and Paul (Zac Efron) are driving east on the 59th street bridge the Manhattan Skyline is incorrect. You would have to be driving west to see this view.

When Seth and Hailey are at the Restaurant and he is about to surprise Hailey with a unexpected kiss, her head is turned away talking and when she turns back towards Seth her lips are already puckered up expecting the kiss.