What happened on Monday's Dancing With the Stars premiere when the cameras weren't rolling?
At one point, she looked at fellow dancer Erin Andrews and said, "All I want to do is bite my nails off!"
Vienna Girardi sat with fiance Jake Pavelka's parents in the audience, rooting on the former Bachelor star.
Interestingly, she paid no attention to Pavelka's folks.
"They did not speak at all or interact -- it was very noticeable to me," says the witness.
Former Bachelor contestant Gia Allemand sat with them in the row.
"Gia and Vienna chatted throughout the entire show," the witness tells Us. "They whispered and chatted. Sometimes they'd turn around and talk to [Bachelorette stars] Ed Swiderski and Jillian Harris. But they never talked to [Jake's] parents at all -- even after Jake performed!"
After the show, Pavelka smooched Girardi (in a skin tight black mini) and hugged Allemand.
Niecy Nash and her partner Louis Van Amstel got the biggest reaction of the night.
"Everyone went crazy cheering for them, giving them a standing ovation," says the witness. "Niecy even got a little emotional over all the people cheering! They were the most likeable couple of the night."