Ms Chebli was nominated for the award by her colleague Ciaran Murray.
“For the past three months, Naima has given up her lunch-time while she’s in work to perform Karaoke sessions for patients,” Mr Murray said.
“Clients who typically refuse to join in groups or eat in the dining rooms have been coming to these sessions.
“She lifts everyone’s spirits and has single-handedly changed the culture.”
Ms Chebli received a sculpture and a gift voucher worth €1,000.
“I’m on top of the world to get this award,” she said.
“This year has been so challenging for everyone, but it’s really ending on a high.