Singer Miguel performs onstage at the HARMAN Retail Store launch party on Madison Ave in New York City on November 14, 2013

Singer Miguel performs onstage at the HARMAN Retail Store launch party on Madison Ave in New York City on November 14, 2013

*Country and R&B will get their swirl on at tonight’s Grammy nomination concert when Keith Urban and Miguel combine for a rendition of Bill Withers’ “Ain’t No Sunshine.”

The pair, who has never performed together, spent most of their rehearsal time inside LA’s Nokia Theatre on Thursday working out the kinks for a minimalist performance that features no band — just a cellist and Urban on guitar and Miguel broadcasting the rest of the song from his laptop, according to the Associated Press.

“That’s our whole band right there,” said Urban, who begins his third season as an “American Idol” judges in January.

While Miguel, who won the Grammy for best R&B song earlier this year for “Adorn,” tinkered with the tune on his computer at one point during the rehearsal, Urban and the backup cellist broke into an impromptu rendition of “Have Yourself a Merry Little Christmas” underneath the starry scene projected on screens above them.

“I don’t have any of that on my laptop,” joked Miguel.

After the duo finished their rehearsal, a giddy Lorde later took the stage to perform a pulsating, stripped-down version of her hit, “Royals.” Dressed casually in a flowing white shirt, black jeans and purple lipstick, the breakout 17-year-old singer breezed through the song on her first attempt.

Other artists scheduled to appear at the nominations concert include Macklemore and Ryan Lewis, and Robin Thicke, who will team up with T.I. and Earth, Wind and Fire to perform “Blurred Lines.” The show will also feature pre-taped performances from Katy Perry and Taylor Swift.

The 6-year-old nominations show returns to the Nokia Theatre after being held last year in Nashville, Tenn., at the Bridgestone Arena.

The 56th annual Grammy Awards will take place Jan. 26 across the street at the Staples Center.