Emma: Your wedding's gonna be huge, just like your ass at prom.
Liv: Your wedding can suck it.
When Emma goes to crash Liv's wedding ceremony, as she crashes through the glass doors you can see film crew reflected in the glass panes.
Whilst shooting a scene where Liv and Emma slap each other, Kate Hudson accidentally hit Anne Hathaway in the face with her diamond ring. Hathaway managed to finish the scene despite being in pain and was later found sitting in a chair with an ice-pack on her face.