Grey's Anatomy Season 8 Episode 13

Cristina: We don't have to do that thing where I say something then you say something and then someone cries and there's a moment or whatever?
Meredith: Oh, yuck.
Cristina: Good.
Meredith: It's just that... Nothing is turning out the way I thought it would. It's like I don't even recognize my own life.
Cristina: I know what you mean. Ugh. I gotta go get some sleep. You gotta go get some sleep. You look like crap.
Meredith: I look better than you.
Cristina: Not possible

This entire conversation is a refernce to the conversation the had in the first episode A Hard Day's Night. Conversation from A Hard Day's Night:

Cristina: We don't have to do that thing you know where I say something and then you say something and then somebody cries and there's like a moment ...
Meredith: Yeah.
Cristina: Good... You should get some sleep. You look like crap.
Meredith: I look better than you.
Cristina: Not possible.