The 61-year-old supermodel married Bowie in 1992 and stayed by his side until he passed away of cancer on Jan. 10, 2016.
Two days ago, Iman also posted a drawing of the star as a child with his signature lightning bolt over his eye.
She wrote, "Jan 8th #ForeverLove #BowieForever," on what would have been Bowie's 70th birthday.
The former fashion model has continually paid tribute to her late husband on social media, often reminding users of her love for the "Starman" singer and her struggles with his loss.
"It's just been a tough year, but I'm holding up," she said during New York Fashion Week.
At the time, she was wearing a necklace that read, "David" and noted she would wear it until her death.Read more at NYDailyNews