Demi Lovato and Nick Jonas paid tribute to Christina Grimmie and the victims of the Pulse nightclub shooting during their Orlando concert on Saturday (02.07.16).

Demi Lovato [Instagram]

Demi Lovato [Instagram]

The pair gave an emotional performance of 'Rise Up' with Andra Day as the names of the 49 victims of the gay nightclub shooting flashed up on the screen behind them, along with that of the former 'Voice USA' contestant, who was shot by a crazed fan the same weekend.

Nick took to Instagram after the performance to write: "Orlando you were incredible last night. Thank you @andradaymusic for helping DEMI and I are honor the victims of the terrible acts of violence recently. #riseup #hondacivicfuturenowtour (sic)."

Demi also posted a picture of herself wrapped in a rainbow flag.

And Nick and Demi surprised employees of Pulse with a VIP package to see their concert and posed for pictures with them.

A message on Pulse's Facebook page read: "Nick Jonas & Demi Lovato, thank you for making the pulse family smile ‪#‎onepulse ‪#‎orlandostrong ‪#‎pulseorlando. We will rise and not be defeated! ‪#‎onepulse ‪#‎pulseorlando (sic)."

TMZ reports that 30 employees received a private suite at the concert venue.

Following the shooting last month, Nick, 23, joined a vigil at gay rights landmark the Stonewall Inn, to remember the victims of America's largest ever mass shooting.

He said: "More than anything, I just want to speak from the heart and say I woke up yesterday to the news, like all of you, and my heart broke.

"I grew up here in New York City and New Jersey, performing on Broadway shows, surrounded by some of my closest friends from the LGBT community.

"My father, a minister from New Jersey, shaped my view that love is love, that we are all equal. That no matter who you are, or where you're from, or where you're going in life, you have the right to love and be loved. So yesterday, thinking about the families of the victims and the lives lost, I just thought that could be my friend. That could be my people."

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