In February 2015, Mayer performed alongside Ed Sheeran at the Grammy Awards. As of March, Mayer said he was taking break from working on a "deeply personal new album". Also, Mayer recounted that in 2011 he happened upon a song by the Grateful Dead while listening to Pandora, and that soon the band's music was all he would listen to. In February 2015, while guest hosting "The Late Late Show", Mayer invited Grateful Dead guitar player Bob Weir to join him in a studio performance. While Weir, Phil Lesh, Mickey Hart and Bill Kreutzmann (surviving members of the Grateful Dead) were preparing for their tour with Trey Anastasio, Mayer began practicing the band's catalog of songs. That August, Mayer, Weir, Kreutzmann, and Hart formed the group Dead &amp; Company, along with Jeff Chimenti and Oteil Burbridge, and began a fall tour in the United States. The tour was well received ("Billboard" called it "magical"), and they continued to tour the US into 2016. Although Lesh has declined to join Dead &amp; Company, Mayer also performed with Phil Lesh and Friends at Terrapin Crossroads in 2015.