Rihanna stops in to advise the singers during the toughest competitions yet.

Their coach then chooses who will continue.

Each coach gets just one steal.)

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Credit: Trae Patton/NBC

Blaine picks Hold Back the River by James Bay.

Adam picks Blaine to move on, which means Andi & Alex are toast.

I cant believe theyre out so soon.

Next up are Team GwensBraiden SunshineandEllie Lawrence.

But again, I was surprised.

Braiden takes on Michael Bubles version of Feelin Good.

If youre not a strong enough singer, this song will eat you alive.

On stage, Braiden exhibits total control of every dip and dive the track serves up.

Its his strongest vocal performance yet.

Ellie, on the other hand, falters this week.

Its an easy call for Gwen: Braiden stays.

Barrett goes with Zac Brown Bands Colder Weather.

As always, Barrett sounds like a seasoned vet.

He knows exactly where to build the song up and where to lay it back down again.

His Battle performance of Walking in Memphis was more affecting, but he still sold it in the Knockout.

Both singers have that other quality their coach prizes, and they both sing slower, more introspective numbers.

Madi picks Joni Mitchells A Case of You.

This is a complex song with an infinite number of moments to pick from.

Yet during her performance, Madi doesnt make one misstep.

She innately understands how to wind her way through a vocal to show off moments both big and intimate.

Its exciting to watch someone do something this unexpected onThe Voice, and succeed.

In rehearsal, Rihanna advises Amy to embody the pining sexiness of the song.

Blake begs for her, but Amy chooses Adam as her new coach.

The fifth Knockout is between the two singers Blake saved during the Battles:Chance PenaandIvonne Acero.

Chance considers himself a folk singer, but he decides to sing Demons by Imagine Dragons.

Ivonne chooses Katy Perrys Part of Me, and it is the perfect song for her right now.

More than anyone else, Ivonne has struggled with nerves this season, and its hindered her so far.

That anxiety has showed up as perfectionism at the expense of any emotion or individuality.

But now that Blake has demonstrated faith in her, Ivonne is like a new person.

She nails Perrys big notes and her not-gonna-back-down attitude.

Its the first time Ive seen her potential to do well in this competition.

All the judges respond to Ivonnes growth, and Blake send her through to the next round.

I think its a mistake to pair these two off, because they could both be tremendous this season.

Jordan picks Adeles Set Fire to the Rain.

Blake remarks that it was one of the best live vocal performances hes ever heard.

Viktor isnt ready to let Jordan walk away with this one, however.

He chooses If I Aint Got You by Alicia Keys.

Although Viktor and Jordan are very different, their Knockout performances share some commonalities.

Viktor rearranges If I Aint Got You to suit his jazzier style.

Its impossible to choose between these two, but Adam declares Jordan the winner of the Knockout.

Viktor was never in any danger of going home this early, though.

Gwen swoops in with the steal, earning herself quite a windfall.