90210 continues its roll of guest stars who may have been a big deal years ago with Nick Carter on the May 8 episode, which is called “A Tale Of Two Parties.” Here’s the description from The CW:
NICK CARTER GUEST STARS — A reluctant Naomi (AnnaLynne McCord) tries to sabotage the bachelorette party she has to host for Max’s (guest star Josh Zuckerman) fiancée Madison (guest star Caitlin Thompson), where Madison’s childhood crush, Nick Carter, makes a surprise appearance. At Max’s bachelor party, Liam (Matt Lanter) and Navid (Michael Steger) get into a fight over Silver (Jessica Stroup) and the evening comes to an end with people at both parties getting hauled to jail. Meanwhile, Ivy (Gillian Zinser) blames Annie (Shenae Grimes) and Caleb (guest star Robert Hoffman) for Diego (guest star Yani Gellman) having to go on the run. Jessica Lowndes and Tristan Wilds also star. Rob Hardy directed the episode written by Terrence Coli and Jenna Lamia (#423).