Aubrey O'Day Disgusted by Diddy Acquittal on Some Charges, Physically Ill

12:36 PM PT -- Aubrey took to Instagram with a lengthy statement regarding the Diddy verdict. She clearly doesn't agree with the jurors' decision and says that she is heart broken for Cassie and the other victims.

Diddy's former Danity Kane singer Aubrey O'Day was none too pleased with him being found guilty of only 2 of 5 counts in his federal criminal trial -- to the point where she may need a barf bag!!!

Aubrey was glued to CNN when Diddy was offered some breathing room after learning he wouldn't be sent to prison for life ... a verdict that Aubrey claimed had her tasting vomit, over her sadness for the victims.

Aubrey was optimistic ahead of the trial and voiced heavy support for Cassie and others ... and was in discussion with Homeland Security at one point -- but ultimately didn't testify at the trial.

TMZ also went live during the pandemonium and both the prosecution and defense are actively preparing press conferences ... pre-fireworks this 4th of July, courtesy of the media!!!

Danity Kane formed in 2005 on Diddy's "Making The Band" MTV series before breaking up for good in 2014.

Aubrey also refused to accept Diddy's catalog cash-out, which came with a clause that forfeited her right to publicly bash her ex-Bad Boy boss.