James Hetfield used the Audio-Technica Artist Elite AE5400 microphone primarily during live performances on Metallica's tours from "St. Anger" through "Death Magnetic." He can also be seen using this microphone in the "St. Anger" rehearsal video. While he now opts for the Shure Super 55, the AE5400 was a significant part of his setup during that period. This information is detailed in an article on Metalwani.

According to producer Phil Ramone, Bono used the AE5400 for "I Wanna Be Around" off of Tony Bennett's Duets: An American Classic.

Bennett and Ramone had collaborated before, and both were keen on using classic recording techniques so well-suited to these songs and artists. “I’ve always loved the way the AE5400 sounds for vocals,” says Ramone, who also produced two duet recordings with Frank Sinatra. “And I wasn’t alone — Bono told me he loved the dynamics of the A-T handheld AE5400. And the A-T microphones are able to capture every nuance of performance, so they fit a wide variety of vocal styles.”

“Michael [Stipe] wanted to do all his vocals in the control room; we liked the immediacy of being able to work next to each other,” confides Candiloro. “So I put up a straight mic stand and an Audio-Technica AE5400 with no pop filter and ran that into the John Hardy M-1 mic pre. Although we did the basic tracks on 2-inch 24-track analog, by the time we were recording vocals we dumped everything into Pro Tools.”

The item can be seen 3:42 into this video

"A-T microphones were chosen for vocals on Tony Bennett['s] Duets: An American Classic. GRAMMY®-winning producer Phil Ramone turned to the AE5400 and the AT4047/SV cardioid condenser microphones for recordings on both the CD and a DVD that documents the making of the album.

(...) 'During the recording sessions, many of the artists were interacting with each other and not always singing ‘dead on’ the mic. The 4047 is very forgiving, whether you step back from it or if you’re to the left or right of it. The quality on Tony’s voice and each artist guesting was completely consistent. The handheld AE5400 was also really handy. A few years ago I did an album with Tony where he sang his vocals using the handheld so he could feel like he was performing live on stage. The rejection on the 5400 is terrific and between the 4047 and 5400, not one artist asked if they could try another mic. The trust and belief in my choice of microphones was amazing.'"

"[Audio-Technica:] Are there any particular pieces of gear that you feel are indispensable to your sound (i.e.: certain mic(s), particular reverb unit, comp unit, etc)?

[Erick "Otto" Celeiro, producer for DeGraw:] Usually when we do fly dates and I can’t bring my gear with me, there is something I do not leave behind. We carry a full compliment of A-T mics. One thing I miss the most is the 5000 series wireless. We don’t fly our RF rack so we use all wired mics including the AE5400 wired mic, which sounds good, but not as warm as the wireless version."

"Sometime around the mid-2000s we tried out the Audio-Technica AE5400 Cardioid Condenser Handheld Microphone on her lead vocal, and it was a revelation, both in terms of the live sound and the recording"...