By Lexi Carson Associate Editor Laguna Beach isn’t dunzo. On Tuesday, the Roku Channel released the official trailer for The Reunion: Laguna Beach, which reunites original stars of the reality series: Lauren Conrad, Stephen Colletti, Kristin Cavallari, Lo Bosworth, Talan Torriero, Trey Phillips, Christina Shuller, Dieter Schmitz, Jessica Smith and Alex Hooser, 20 years later. The original Laguna Beach, inspired by the Fox teen drama The O.C., debuted on MTV in 2004 and ran for three seasons until 2006. To kick things off, the trailer begins with Conrad and Cavallari sitting together at a fire on the beach. “We have never had a conversation on camera, just the two of us,” Cavallari says to Conrad, to which she replies, “No.” Then, Hilary Duff’s 2003 hit “Come Clean” starts to play — the theme song to Laguna Beach. Oh, the nostalgia! Throughout the trailer, the old feud between Conrad and Cavallari resurfaces, stemming from a love triangle involving the two and Colletti.…