I can't remember the name of the episode and which season...

I'm trying to find an episode since so many weeks that I've decided to ask the question to you guys. Please, if you know the answer, tell me. D:

The only thing that I remember about that episode was:

Joey and Phoebe were in Phoebe's grandmother's cab (yeah, I think it was her grandmother's), and I also remember that Phoebe got mad at Joey because he fall sleep, Phoebe said that Joe said ''You promesed me this was going to be fun!'' or something like that. Later, Joey starts singing and stuff so Phoebe doesn't get bored.

That's all I can remember right now. And, if you ever need more information that I remember from that episode (if I can remember) tell me.