Lindsay Lohan's legal issues became a problem during filming as there were some days were she would either show up late or not show up at all, it got so out of hand that Chris Sivertson was forced to use a body double and digitally replace her face with Lohan's while filming the climax of the film for the days she was not on set.
Blue objects are dominant throughout the runtime of the picture, as the color represents Aubrey's personality. In the first 35 minutes alone we see Aubrey's dark blue shirt, along with her blue dress, blue gloves, a blue pill, blue football uniforms, football fans wearing blue sports shirts and blue body paint, Douglas Norquist's blue ring, a blue mouth gag, a blue laptop bag, a blue cat collar, Aubrey's blue Lexus car, Douglas's blue car, blue tools of torture, a blue solution poured on a hand, blue everything in an operating room, a blue hospital gown, a blue iPod, a blue candy jar, blue roses, a blue pen with blue ink, a blue photo album, foggy blue glass with red graffiti at a bus stop, blue bus seats, blue walls in a classroom, and blue hospital walls, even some characters have blue eyes.
This is the third time Lindsay Lohan played two characters in one film. Her first time was as Hallie Parker and Annie James in The Parent Trap (1998) where she played twins and her second time was in Freaky Friday (2003) where she played mother and daughter Anna Coleman and Tess Coleman, whose bodies were swapped after an unfortunate Chinese curse.
In the first week of production, filming was halted after Lindsay Lohan had her appendix removed, filming was delayed even longer after the incision was infected and the filmmakers were waiting for a doctor's approval for Lohan to continue working. This occured at the same time Lohan entered rehab for the first time in January 2007. Filming finally resumed in February.
Held the record for the most Razzie Award "wins" by one film in a single year, with 8 awards including Worst Picture of 2007. A record that was previously held by both Battlefield Earth (2000) and Showgirls (1995) and was later broken by the Adam Sandler comedy Jack and Jill (2011) (another movie where the lead actor plays two characters), with an incredible ten awards, including Worst Picture of 2011. The film received 9 nominations and only won 8 of those awards, the only award the film lost was Worst Supporting Actress for Julia Ormond who lost the award to Eddie Murphy for his role in drag in Norbit (2007).
Because of her negative reputation, Lindsay Lohan could not even walk to her trailer without the paparazzi photographing her, sometimes they would even end up in the background of some shots of the film.
Scenes in the trailer that didn't appear in the theatrical cut include Jerrod (Brian Geraghty) talking to Aubrey about her story "Dakota" and stating "Aubrey you talk about her like she's real, it's a stupid assignment for class" and an unidentified character talking to another character and saying "she looks just like her but it ain't Aubrey".
Oddly, while most store-exclusive bonus discs with special features are included in an envelope in the case, the bonus disc with cast and crew interviews for this film was instead included in it's own case separate from the film.
In Aubrey's bedroom seen throughout the film, if looking closely behind her door, you can spot a familiar purple guitar leaning against the dresser drawer. Not only is purple a color made from combining blue and red, the two dominant colors of the film, it's also the same guitar that appears on the cover of Lindsay Lohan's album "Speak."
When Dakota is about to do a Google search on Aubrey's laptop, she finds it's locked with a password and somehow figures out what it was. The password was actually Dakota, named after her story of the same name. Although we don't see the password on the screen, if looking closely at the keys Dakota is typing, you can see she's hitting the letters that spell that name.
According to behind the scenes interviews, during the interrogation of Daniel Fleming by detectives searching for a missing Aubrey, a mural containing several paintings and drawings can be seen right behind Daniel as he's talking to them. This mural's paintings actually contain several clues and hints towards the twists and turns that will happen in the film.
In her hospital room, after Dakota has been treated, she is interrogated by a psychiatrist. He starts asking Dakota questions and writes her answers down in a notepad divided in half, with various bits of info on Aubrey written in blue while Dakota's answers are written in red. He is using one of those pens that can hold four different colors of ink. Aubrey's color is represented by blue while Dakota is represented by red.
The Flemings and Dakota are driven home from the hospital by the police to avoid the reporters, while in the backseat, Dakota's face is lit up, alternately, in blue and red from the police car sirens. This is supposed to be a motif that plays on the idea on whether or not she is really Aubrey or Dakota.
The trivia items below may give away important plot points.
The original ending revealed that the characters Aubrey and Dakota were not real and that the entire film was simply an unnamed college student's script (also played by Lindsay Lohan). This ending was cut after test audiences found it "too predictable" (it is included on the DVD and Blu-ray extras).
The killer's victims are always afflicted with injuries including missing fingers, removed metacarpals (palm bones), and a missing leg. These body parts are all required to be able to play the piano. This is a foreshadowing technique pointing to Aubrey's piano teacher Douglas Norquist being the killer. Another foreshadowing technique was when Aubrey pricks her middle finger on the blue rose Jerrod gives her, and when gardener Kenny Scaife tries to show off for Aubrey and she instead gives him the middle finger. This was the first finger both Aubrey and Dakota lose, Kenny is next seen at the football game with Aubrey, seemingly stalking her, though his character turns out to simply be a red herring and not the killer.
In the alternate ending the unnamed student is wearing a purple shirt. Purple is made by combining blue and red which are prominent colors in the film that represent Aubrey and Dakota's personalities. Fittingly the student is also played by Lindsay Lohan.
While there appears to be nothing ambiguous about the ending, with Dakota simply saving Aubrey, one theory is that everything after Aubrey is tortured takes place within Aubrey's mind - she imagines that the 'Dakota' character from her story is her sister and eventually saves her - as a way to cope with the horrendous things happening to her.
A subplot was filmed involving one of Douglas's other victims Gabrielle Sherwood (Michelle Page) being rescued along with Aubrey by Dakota though this subplot was deleted during post-production (along with scenes involving Gabrielle's mother Paloma Sherwood (Debra Christofferson)).
When Dakota visits Jennifer Toland's grave she finds her blue ribbon which says "Blue Ribbons Are For Winners, Never Settle For The Red, Rest In Peace, Douglas", this not only reveals that Douglas is the killer it also is a metaphor for Aubrey and Dakota's lifestyle. Aubrey always had a good life with wealthy and loving parents, a caring boyfriend, straight A's in school, good friends, and a bright future hence she is the "Blue Winner". Dakota on the other hand grew up in poverty with a crack-addict mother and settled for exotic dancing to financially support herself hence she represents the lackluster red.
The primary colors of the film, red and blue, symbolically represent Aubrey and Dakota's personality. Aubrey is the sweet color blue. Blue is for sweetness and calmness. Aubrey always wears the color blue (the color itself also drapes almost every scene in the film). In the climax of the film when Dakota rescues Aubrey, the screen shows Dakota outside and Aubrey in a coffin. They are both saying what is on the back of the blue ribbon on Jennifer Toland's grave. Dakota's half is covered in red. Aubrey's is in blue. Dakota is the fire engine bad girl red. Red is for blood and death. Almost all of Dakota's stripping clothes are red. If the clothes aren't red she is at least wearing red earrings (and when the film focuses on her point of view the color red is everywhere).
Jeff Hammond said his main inspiration for writing the screenplay was to write a story that featured the concept of stigmatic twins, siblings with a psychic connection that lets them feel each other's pain and experiences. Producer Frank Mancuso Jr. saw this script and helped get it greenlit for production because he was impressed by the original concept.
Several moments in the film allude to the idea of doubles, or two halves. Aubrey at one point mentions that she feels like half of her soul is missing, a student in the biology class asks if cutting a worm in half will result in two more worms, and the motorist who rescues Dakota off the side of the road talks over the phone about feeling like "half a person", all of which foreshadowes the revelation that Aubrey and Dakota are psychic twins.