It's been three years since the Grenfell Tower fire in London killed 72 people and wounded countless others.

The fire has since been named one of the U.K.'s deadliest structural fires. Grenfell Tower, a 24-story public housing block, was often referred to as a disaster waiting to happen; it lacked adequate fire escapes, fire alarms and sprinklers, and had a highly flammable facade.

As the country came together to mourn those lost in the blaze, Adele made a rare public appearance on Sunday to not only express her love and support to those affected by the tragedy, but to also make an impassioned call for unity.

Appearing 13 minutes into Grenfell United's REMEMBER GRENFELL memorial livestream on Sunday, the "Hello" singer conferenced in via Zoom. "It’s still so important for us to mourn together and for us to remember that night and to reflect on that and also reflect on where we are now with that," Adele began. "But also to celebrate the lives that were lived before they were sadly taken that night."

The 32-year-old also touched upon the civil unrest gripping the world in the wake of George Floyd's death: "I think that this year, more than ever, there has never been a more appropriate time for us to truly exercise camaraderie, and compassion, and open-mindedness and persistence."

While urging those to continue demanding "answers" and "action," Adele continued, "It's a scientific fact that human beings are pack animals. We're not supposed to be left on our own. We need each other to survive and that is something that I truly see in action with the Grenfell community."

Growing emotional, the Grammy-winner said, "I have never been so moved or so inspired by a group of people before. Your resilience is second to none."

While she's upset she couldn't mourn with the community in person this year, Adele promised to attend next year's memorial.

"Stay safe, stay healthy," she concluded and blew a kiss.