Brandi Carlile

"These are just a few of the challenges we faced but believe me, there were more. And we are the lucky ones!"

Fundraising totaled over $100k, all earmarked for Black Visions Collective and Campaign Zero.

It's a message that's particularly important right now.

It's a beautiful ode to John.

The stars are coming together to help.

It bears such an important message.

Carlile will follow previous ambassadors Jack White, Metallica and Ozzy Osbourne.

The singer will be contributing a new song to the upcoming Disney and Pixar movie.

The performance comes on the heels of a Grammy triumph.

"Bring My Flowers Now" is Tucker's Grammy-winning song off her comeback album.