NBC's The Voice kicks off its eighth season tonight, Feb. 23 and the show's YouTube channel has given a glimpse into what to expect from at least two contestants.

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On Feb. 18, The Voice's YouTube channel uploaded Sarah Potenza's blind audition, which will air tonight.

The singer performs a gritty version of the Faces' Stay With Me, which wows all four coaches, earning her a four-chair turn. 

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The fact that Adam Levine, Pharrell Williams, Christina Aguilera and Blake Shelton all want her leads to the typical bickering that has come to be expected whenever the coaches battle it out for a contestant they all really want on their respective team.

Levine points out that Potenza bonds with Williams, Aguilera and Shelton, but he feels left out.

"Between Blake's boots, Pharrell's jewelry and Christina's attitude, where am I in this equation here?" he asks, which leads to Shelton shouting, "Nowhere!"

Then, on Feb. 20, The Voice's YouTube channel uploaded 15-year-old Sawyer Fredericks' blind audition, which also sent all the coaches into a tizzy since they all instantly wanted him.

Fredericks' song of choice was I'm a Man of Constant Sorrow, which earned him an incredibly soulful performance.

Levine wants to have Fredericks on his team to "crush Blake with."

Watch the premiere of Season 8 tonight to see whom Potenza and Fredericks pick as their coaches.

Tune in on Mondays and Tuesdays starting at 8 p.m. ET for Season 8 of The Voice on NBC.

Tags: The Voice nbc television