In this picture you can see the guitar rig opened. On his project Imaginary friends.

At 8:22 of this video, the Ableton dialog box says "VST Guitar Rig 2; VST plug in could not be found."

"Guitar Rig is a guitar player's dream. Stacks of amps, loads of pedals and multiple mics at the flick of a mouse. I love it !!!!"

"You chose to use Reaktor rather than Guitar Rig?

Well, eventually Guitar Rig worked its way into the process. Sometimes we'd make a very clean patch that only utilized the amp simulators or different arrays of speakers and then take whatever we might be using as the front head and run it through the amp simulator in Guitar Rig." - via the archived NativeInstruments.com

"But I'll tell you what I started doing about two years ago, is recording DI and using software guitar amplification, primarily because I thought if I put in a performance that's a once-in-a-lifetime performance on this particular song, I'm going to want to keep it. And I don't trust doing it here at home. But if I record it direct, it'll sit there in the session and then when we get to a real studio and we've got the real band recorded with microphones and a big room, we can re-amp that performance, and re-record it. And that's what we did quite a bit for the Black Swans and Wormhole Wizards record. There are quite a few songs that I had recorded using SansAmp or Guitar Rig, but they were all recorded DI. I would monitor those software patches at home, and then when we got to Skywalker, we either used a combination of those software guitar patches, or we would send the DI out into Marshall amps and different speakers and mic them anyway we want based on what we had captured from the band."

In his reddit AMA, Madeon says he processes his synths using Guitar Rig.

In a separate interview he says "Guitar Rig...has been used on so many of my songs that it's a little bit ridiculous!"

“I like NI Guitar Rig as an effect on things like vocals[...] I do that quite regularly. It’s great running things through the amps, and even if I’m not using much distortion you can get some really cool, different sounds."

In the video titled "Paul Meany - Twenty One Pilots - Next Semester - Production Peek" by 1PM Music on YouTube, at 0:34, Paul Meany demonstrates the use of Native Instruments Guitar Rig 6 on the channel strip for the song "Next Semester." Later in the video, Meany mentions that Tyler Joseph, the artist, is fond of using Guitar Rig.

"Guitar Rig is a little box of audio dynamite! There will be many amps, cabinets and effects out there getting jealous over this one! I love this machine!"

Charlie describes the Guitar Rig preset used in the song, "Mother".

In a livestream titled "4.5.20 - Quick CoronaJam!" on his YouTube channel, Mike Shinoda uses the Native Instruments Guitar Rig 6 plugin.

"I use Guitar Rig a lot to process a whole host of things, not just for distortion but every type of modulation really, it's actually my favorite reverb as well, one of the verb units within it, so I use that a lot."

Original Q&A found here.

"We always use either Guitar Rig or Amplitube live. That will be changing after this tour though. we are heading back to the studio to rebuild the live show from the ground up and the Kempers will be at the center of it."