Here's what's in store for Tuesday's episode "Vegas, Maybe?" (from CWTV.com):
VINNY GUADAGNINO AND BILLY RAY CYRUS GUEST STAR - The gang heads to Las Vegas, where Naomi meets Austin's (guest star Justin Deeley) dad, and country superstar Judd Ridge (guest star Billy Ray Cyrus). The guys run into a celebrity (guest star Vinny Guadagnino) at the pool, where Liam gets invited to play in a celebrity poker tournament. Teddy and Shane (guest star Ryan Rottman) decide to tie the knot, while Dixon and Adrianna get closer. Meanwhile, Navid sees an opportunity to take his Uncle Amal (guest star Anthony Azizi) down. Shenae Grimes, Jessica Stroup and Gillian Zinser also star. Stuart Gillard directed the episode written by Scott Weinger.
"90210" airs Tuesdays at 8 p.m. ET on the CW network.