He's expected to end Adele's '25' reign this week.
Music Reacts To David Bowie's Death
Blackstar is also expected to hit No. 1 on the U.K. album chart later this week.
Producer Tony Visconti, who worked with Bowie on Blackstar, says the album's release coinciding with his death was a "parting gift" for fans.
"He always did what he wanted to do. And he wanted to do it his way and he wanted to do it the best way," Visconti said on his Facebook page. "His death was no different from his life - a work of Art. He made Blackstar for us, his parting gift. I knew for a year this was the way it would be. I wasn't, however, prepared for it. He was an extraordinary man, full of love and life. He will always be with us. For now, it is appropriate to cry."