Hill was scheduled to take the stage during the live telecast of the 58th annual GRAMMYs "but failed to show up in time for the performance," a rep for the Recording Academy told ET in a statement.
The Weeknd, 26, ended up performing "In the Night" solo. Later, Hill’s team claimed the award show performance announcement was premature and "without approval."
"Ms. Hill had concerts all weekend, leaving no time to prepare and was uncertain she would even be able to make it to L.A. in time to rehearse for the event," her rep told ET. "Any performance that could have happened was never confirmed and should not have been advertised as such.”
Recording Academy President Neil Portnow explained Hill's absence further at the GRAMMYs.
"Lauryn Hill was someone that The Weeknd felt would be great to collaborate with and reached out to her and had those conversations and wanted to bring that performance forward," Portnow said backstage. "We actually had some rehearsals off-site that she did not attend, but we had dress rehearsal this morning in Staples on that stage, which she did attend."
"When it came to actual show time, we were told that she was late -- maybe a minute, three minutes out, seven minutes out. She didn't make the performance ... that's the truth. We hate when that happens," he added. "I'm not accountable for why that happens. I know when I have to be some place some place on time, I figure out how to do that. Again, unfortunate that she didn't show up to do that. Again, great credit to The Weeknd ... but with all best intentions, sometimes things change and he killed it."