Here are some spoilers for episode 22 of 90210. This episode airs on 5/5/2009.
Following their engagement, Navid and Adrianna celebrate their respective bachelor and bachelorette parties. While Adrianna feasts with friends and family at the Wilson home, Navid and the boys have a wild night with some college girls at a burlesque club. Meanwhile, sparks fly between Ryan and Jen, and Dixon continues to feel unappreciated by Silver.