At one point in Legally Blonde 2, Elle and her boyfriend/fiancé are lying in separate beds in separate rooms, watching the same film on TV and talking on the phone to each other, which is just like Harry and Sally do, when they watch Casablanca in the same manner. The phone call is shown with a split screen, just like in When Harry Met Sally...
John Cena says, "I'm like Terminator 3, you're like a Legally Blonde sequel ."
Sean and Claudia are watching this in the teaser
Movie poster on theater seen in the film.
DVD cover shown in the video store
This title is referenced.
correct response in "Let's Go '2' the Movies" category
One of the sketches being worked on mentions "Legally Blonde II".
Mentioned in one of the questions.
Video set up as dominoes.
Mentioned in film.
Title mentioned by Chelsea Handler while honoring Reese Witherspoon
Mentioned in dialogue.
DVD seen in video store
Clips of mistakes shown
Mike discusses the first sequel
the scene where she runs up the stairs to her trainier