Journey's "Don't Stop Believing" song on MTV's Laguna Beach

I recently heard that the song "Don't Stop Believing" by Journey appeared on the former MTV show Laguna Beach: The Real Orange County. I've seen the clips of American Idol contestants singing the song, but for some reason, I really want to find that episode in which the girls from Laguna Beach sing the song. I think the reason why is that I once encountered a web page that displayed celebrities' choices of songs to sing on American Idol, and one of them was Lauren Conrad, a former Laguna Beach cast member (now a regular cast member on The Hills) who said that she would sing "Don't Stop Believing" if she auditioned for American Idol. Later, I discovered that she and all the girls from Laguna Beach sang along to that song in one episode. I do know that it is an episode in season 2, which aired in 2005, but I don't know the name of the episode in which they sing the song. Can someone please help me find the name of the episode and the video clip? Thank you very much.