It's been three weeks since the horrifying June 12 attack on Pulse Nightclub in Orlando, Florida which left 49 people dead, but we're still feeling the emotional shock-waves from the tragic shooting — and it's unlikely that the feeling will go away any time soon.

Like us, devastated celebrities are still pouring their hearts out for the victims, especially within the music industry: On Saturday July 2, Demi Lovato and Nick Jonas hit up the Amway Center in Orlando while on their joint Future Now Tour, and together the two singers teamed up for a heartbreaking tribute to those lost and affected by the shooting that wracked the town last month.

Lovato and Jonas first shared a touching prayer with the audience before inviting Grammy-nominated artist Andra Day onto the stage.

"This song is incredibly inspiring, and she is incredibly inspiring," Nick said as he introduced the singer-songwriter, describing her as a "dear friend."

While the headliners sang backup, Day dedicated her uplifting R&B hit single "Rise Up" to the victims. As the three performed, all 49 names of those murdered at Pulse — as well as the name of The Voice finalist Christina Grimmie who was shot to death on June 11 — scrolled on a screen behind the them in a touching display of solidarity and mourning.

Watch below:

Stars We've Lost in 2016: