When Summer and the actor from The Valley is "caught" by his girlfriend, Summer makes a comment about them dating, and wouldn't that ruin the show. Rachel Bilson and 'Adam Brody' were dating at the time.
Ben McKenzie's character Ryan makes a comment about the fact that Colin Hanks' character is too old to play a high school student. In actuality, Hanks is only one year older than McKenzie, who also plays a high school student.
Seth makes a comment about self indulgent actors with instruments. 'Adam Brody' has his own band called Big Japan.
When Marissa and Summer see Grady Bridges, Marissa asks who he is. A couple of episodes previously she was watching an episode of The Valley so she shouldn't have had to ask.
Hailey is wearing a curly hair piece in this episode while dancing on the pole then when she was finished dancing she took the hair piece off to show her straight hair again.