Plot hole: The scene where Andie comes over for dinner and moves a bunch of frilly stuff into the bathroom, happens at least one day before she comes over with the wedding album she made. In that scene, Ben goes into the bathroom to splash water on his face and discovers the pink hand towel and other stuff - that means he would not have gone into his bathroom for at least a day, or two, since she put the stuff in there, or he would have noticed it sooner.
How to Lose a Guy in 10 Days (2003)
2 plot holes - chronological order
Directed by: Donald Petrie
Starring: Matthew McConaughey, Kate Hudson, Adam Goldberg, Bebe Neuwirth, Kathryn Hahn, Thomas Lennon, Michael Michele, Annie Parisse, Robert Klein, Shalom Harlow
Continuity mistake: In the scene where Ben just ran down the fire escape to Andie, she walks away waving. In the shot of her front side she's waving with her right hand, and then in the next shot (a rear shot) she has her left hand up. (01:08:38)
Glenda: Now Andie, I hope you know that we expect you to come back here because you have held Ben to his lowest bullshit score since his tonsillectomy and we are thrilled.
Jack: Lowest.
Andie: Why, were all his other girlfriends bullshit losers?
Glenda: What other girlfriends? You are the first girl he ever brought home! Don't you break his heart now.
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Answer: No.