Just a few weeks after their divorce, Camille Grammer's ex-husband Kelsey Grammer walked down the aisle for the fourth time. The 'Real Housewives of Beverly Hills' star is not taking the news well, but she's "moving on."

"She was very upset," her Bravo co-star Lisa Vanderpump told E! Online. "It's public, it's humiliating, and she's very vulnerable. It's very upsetting."

Though her rep claims Grammer "wishes the best" for Kelsey and his new bride, Kayte Walsh, Vanderpump points out that it's never easy to end a 12-year marriage.

"As anyone can imagine, it's a difficult time for Camille," Vanderpump dished to RadarOnline.com. "She was upset when this situation all went down. But she's a fighter, and she'll be just fine."