“The Voice” Season 9 coaches Blake Shelton, 39, and Gwen Stefani, 46, spent Christmas week together. On Monday, the couple went to the University of Phoenix stadium in Glendale, Arizona to watch an NFL game.

The NFL game was between the Arizona Cardinals and the Green Bay Packers, and the former won. The Arizona Cardinals, which is Shelton's favourite team, scored 38, while the Green Bay Packers scored 8 only.

Stefani wore her trademark red lipstick as she watched the NFL game between the Arizona Cardinals and the Green Bay Packers. The singer also wore a camouflage Arizona Cardinals baseball cap while cheering for the favourite team of her boyfriend, who was wearing a team sweatshirt, according to Us Weekly.

It was also on Monday that Shelton and Stefani were spotted with another couple in Santa Barbara, California, where they had wine tasting. As part of a wine-tasting tour, they stopped by Mosby Winery and Vineyard at the Buellton winery.

A source told E! News that Shelton and Stefani tasted some of the wines and stayed at the Buellton winery for about 30 minutes. The source added that “The Voice” Season 9 coaches were very “sweet with each other and seemed very happy together,” although their affection was deemed appropriate. They were reportedly “sweet and delightful” with everybody.

Days before Christmas, Shelton and Stefani were seen shopping in Oklahoma. The store was near the ranch owned by the former, who divorced his country music star wife, Miranda Lambert, a month before Stefani separated from her ex-husband, Gavin Rossdale.

Stefani joined Shelton, Adam Levine and Pharrell Williams as one of the coaches of “The Voice” Season 7, which premiered on Sept. 22, 2014. This marked her debut as a coach on the NBC reality talent show.

In “The Voice” Season 10, Stefani will not return as a coach. Shelton, Levine and Williams will be joined by Christina Aguilera.

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