Generation Gap?

Conversation between me and my sister while watching the opening credits of The Italian Job.

Sister: Does this have Matt Damon in it?
Me: No but it has Mark Wahlberg.
Sister: Who is that?
Me: Marky Mark?
Sister: Oh the guy who plants trees.
Me: What?
Sister: In Clueless, she says that he is going to come and plant a tree.
Me: Well maybe he was, but not because he planted trees. He was a rapper. Marky Mark and and the funky bunch?
Sister: The Brady Bunch!