According to the sources, Kutcher and Oseary have become really close and "often throw parties together," something the manager used to do with Moore in the past.
"[Moore] has been on the outs with Guy for a while," the source continued. "Guy's Oscar party last year was the first since 2006 that Demi didn't co-host."
The insider added there was "no doubt" that both Oseary and Madonna were mutually "freezing out" Moore because they "never make a move without consulting each other."
2014: The Year in Fashion [PHOTOS]
Polly Bergen, Emmy Award-winning actress, dies