The 2015 GRAMMYS was a huge night for newcomers, especially for Sam Smith, with the hunky Brit cleaning house. Rock 'n roll icons were in the house, too, such as Foo Fighters frontman/Nirvana legend Dave Grohl. Fuse caught up with him (while Ariana Grande ran a sound-check in the background—peep that heartbreaking "Just A Little Bit of Your Heart" piano melody!) to talk all things GRAMMYS, and the one time Grohl's buddy Zac Brown decided to spice things up.

"It's weird, they're up on this shelf in my little home studio and they're kind of way up in this corner," Grohl told us of his own GRAMMY trophies. "Every once in a while I'll look up there and I count them...and think, Oh my god, I can't believe I've been around for that long, to do that."

Grohl spoke of the ceremony as more than just a celebration, as a time for musicians of all walks of life to get together. "I like coming in and seeing everyone because it does feel like a community of musicians," he explained. "I got to see LL Cool J, we have the same birthday and we talked about [it]. ... Then you sit down and you see Zac Brown and you hang out with Zac Brown. Doesn't matter what genre or what kind of music anyone plays, this whole section becomes a community of musicians, so it's fun."

Things got truly wild when Grohl befriended Brown:

"I met Zac the night before the GRAMMYs a couple of years ago. I never heard his music before but I'd heard his name and I recognized him. We talked a little bit. He has a studio in Nashville and we were getting ready to do the Sonic Highways project, where we record all over the country and he said, 'If you want to use my studio, you could always come to Nashville and use it.' We swapped phone numbers and that night he texted me and he said 'Also if you're into tactical knives, I can hook you up.' I asked someone, 'What the f*ck are tactical knives? I don't even know what that is, what is that?' I texted him back, 'I can't wait to see you, but don't be bringing that sh*t to the GRAMMYs, they'll never let you in the front door.' Then the next day I was sitting in my seat and he was sitting right in front of me. I said, 'Hey man, if you win the next award let's drink a little whiskey after,' and he says, 'Hey, I brought you something' and he hands me this huge knife. We were on TV! It was crazy."

Sounds like it! Watch the full interview above and click here for the latest on the 2015 GRAMMYs.