Cheryl Tweedy
Chery and Liam got together in 2016 after her second marriage to French restaurateur Jean-Bernard Fernandez-Versin ended.
The couple had son Bear together in March 2017, but split in July 2018.
In a moving Instagram tribute, the Girls Aloud singer admitted she was struggling to "navigate this earth shattering event".
She posted: "As I try to navigate this earth shattering event, and work through my own grief at this indescribably painful time, I'd like to kindly remind everyone that we have lost a human being. Liam was not only a pop star and celebrity, he was a son, a brother, an uncle, a dear friend and a father to our 7 year old son. A son that now has to face the reality of never seeing his father again. Before you leave comments or make videos, ask
yourself if you would like your own child or family to read them. Please give Liam the little dignity he has left in the wake of his death to rest in some peace at last."