Katie Maloney celebrated her birthday in Las Vegas on Friday night. Katie Maloney celebrated her birthday in Las Vegas on Friday night. 'Vanderpump Rules' Star Scheana Marie Hosts Geek'd Up Bash At Ghostbar Dayclub At the end of the week, Maloney and her Vanderpump Rules co-stars, including Jax Taylor, Scheana Marie, Tom Sandoval, Ariana Madix, Peter Madrigal and Tom Schwartz, made their way to Las Vegas, where they attended a birthday dinner and nightclub outing in Maloney's honor.