The point of the scenes with her in "Valentine's Day"?

While watching the movie, I noticed that everyone had a story, and the movie had a plot...but her 😐...

But as for her, I didn't understand at all what her "story" was about, what was she actually doing there?

If you look closer, we only found out that she can't dance, can't speak normally (all that came out of her mouth was sh....s), she acts awkward, and I'm surprised her boyfriend Taylor didn't dump her. Are you also scratching your head when you see the scenes with her in the movie like I am? Isn't her father behind this movie deal?

https://youtu.be/rtGalMgMAe8