Michael Bublé has said he wants to use his platform to share his Christian faith, as he headlined a Christmas concert for those in need at the Vatican.

The Canadian singer-songwriter explained how he views music as "a gift from God," with his faith grounding him in an industry that is "based so much on ego."

Bublé told Vatican News: "When I hear music, I hear the voice of God."

He described his pre-show routine, which involves prayer: "Right before the curtain opens and I walk out, I say the same thing. I say, 'Thank you God, for blessing me with the ability to connect with these beautiful souls.' And when I say it, I get goosebumps."

The lifelong Catholic performed at the Vatican's "Concert with the Poor" on Saturday. Free tickets were offered to 3,000 vulnerable people, who are supported by volunteer organizations around Rome.

Attendees were given dinner and comfort items after the concert.

Bublé said it was "an honor to serve" and to celebrate the birth of Christ. He shared that he teaches his children about how Jesus washed the disciples' feet as an example of serving others.

At the event, Pope Leo described music as "like a bridge to God."

"The melodies touched our hearts, we felt the inestimable value of music: not a luxury for the few, but a divine gift accessible to everyone, rich and poor," he said.

"It is not a coincidence that the feast of Christmas is very rich in traditional songs, in every language and every culture. It is as though this Mystery could not be celebrated without music, without hymns of praise."

The pope thanked Bublé and the musicians, as well as Cardinal Vicar Baldo Reina and Monsignor Marco Frisina, for their involvement in the concert.