Evans Vestal Ward/Bravo

Back in December 2011, Richards checked into an undisclosed treatment facility to address her issues with substance abuse. Just over one month later, her sister, Kyle Richards, confirmed that her sibling had checked out of treatment.

"We're very happy to report that Kyle told me exclusively off the air Kim is actually out of rehab!" Ryan Seacrest said at the time. "She assured us, despite reports to the contrary, Kim is not drinking or partying at all, and is on the road to recovery."

Richards' bizarre behavior has been highly documented on the Real Housewives of Beverly Hills. During the season one finale, Kim and Kyle had a blow-up fight on camera, causing Kyle to scream at her sister, "You are an alcoholic! Yeah, that's right. I've said it now and everybody knows."

Earlier this week, the Real Housewives of Beverly Hills season seven reunion aired, where the reality star insisted she has not been struggling with her sobriety. Kim's alleged substance abuse resurfaced as a plot point this season after the 50-year-old mother of four took a pain pill from her ex-husband, Monty Brinson, which caused her to exhibit erratic behavior.