While the ceremony honored David Bowie, Motörhead's Lemmy Kilmister, Earth, Wind & Fire's Maurice White, The Eagles' Glenn Frey and B.B. King with individual tribute performances, Cole was only featured in the Grammys In Memoriam montage.
"Here is a woman who has been in the business for four decades, had 21 Grammy nominations and won nine Grammys," Cole's son Robert Adam Yancy told Entertainment Tonight. "She deserves more than [to be a part of] a minute-and-a-half tribute. It was shameless the way they minimized her legacy. We will find solace in her legacy as well as her endless fans around the world."
Cole's sisters, Timolin and Casey, shared a similar sentiment, telling ET: "Sadly a FORGETTABLE tribute to Natalie Cole. Words cannot express the outrage and utter disappointment at the disrespectful tribute, or lack thereof, to a legendary artist such as our sister."
Cole, who was the daughter of legendary singer Nat King Cole, won nine Grammys in her lifetime and was the first black woman to win Best New Artist. She died at the age of 65 of heart failure in December.