All three met up again at an exclusive resort in Cabo, the $9,500-a-night Casa Olivier, where reportedly plan to ring in the New Year.
Also in tow were Jimmy Kimmel and his wife Molly McNearney, as well as Howard Stern and wife Beth Ostrosky.
"Courteney was hanging out with Jen and they seemed to be as close as ever," a source told Us Weekly. "They spent a lot of time talking by the pool and laughing together with Justin."
Cox wasn't photographed alongside any partners, though she's rumored to be dating Snow Patrol's Johnny McDaid.
[Us Weekly, E! News]