"This cruel world is always [too] quick to judge someone," she added.
On top of federal criminal charges, the embattled rapper and mogul has now been sued more than two dozen times over alleged sexual abuse.
The couple broke up in 2013, but Peazer said the late 1D member had recently reached out to her before his death last week at 31.
They lavished Detroit with praise after Donald Trump recently disparaged it.
“I'm sorry I couldn't save you. Love you, oh how my heart misses you," she wrote.
"Please give Liam the little dignity he has left in the wake of his death," the singer wrote.
"Nothing about the past few days have felt real," added the influencer in her tribute to the star.
The singer who died at 31 on Wednesday after a fall from his Buenos Aires hotel room also told his younger self that he'd one day meet the "most amazing person," his son Bear.
Democrats are also rolling out Eras-themed billboards in battleground states.
Fellow British boy band veteran Robbie Williams said Payne's "trial and tribulations" were similar to his struggles in Take That, echoing Osbourne's thoughts on the downsides of fame.
