Are two of the Real Housewives of Beverly Hills ladies shockingly no longer besties? Lisa Vanderpump and Yolanda Foster couldn't have been tighter in Season 3, but it appears that the two are currently on the outs. Say it ain't so!

Lisa  who is pals with Yolanda's ex Mohamed Hadid  helped bring Yolanda onto the show, and the ladies seemed to be chummy when the show began filming Season 4 earlier this year. Lisa attended Yolanda's US citizenship ceremony and was on-hand when Yolanda's hubby David Foster received his star on the Hollywood Walk of Fame. 

Credit: Instagram

But here's why things are no longer looking so rosy: Lisa has now unfollowed Yolanda on Twitter, suggesting that the two had a falling out while taping the show in Puerto Rico. Considering that Lisa follows her closest pals, this appears to be a bad sign. 

Also adding to rumors that the two are feuding is an Instagram photo taken recently by an onlooker. It appears to show Yolanda and Lisa engaged in a heated conversation while filming at a restaurant in Puerto Rico.

"They were arguing over something," says the onlooker, who goes by the Instagram handle nativiris. "They were outside for a long time. Yolanda was outside most of the time, and after Lisa went inside, she was talking to Kim and Kyle."

Yikes. We love Lisa and Yolanda's friendship, so we're hoping they can patch things up soon!

Source: All About TRH