Gnarls Barkley's upcoming tour, initially promoted as a reunion and the duo's first tour in 18 years, will feature only CeeLo Green performing. Danger Mouse, the Grammy-winning producer and other half of the duo, will not be performing, as CeeLo Green clarified via Facebook on Wednesday. This represents a significant departure from how the tour was initially marketed, disappointing fans expecting a full reunion of the influential music duo.

CeeLo Green explained that Danger Mouse is his producer and business partner rather than a performing artist, and that the North American trek will showcase Green performing Gnarls Barkley songs he has already been performing solo. Live Nation has since updated the tour announcement to explicitly bill the shows as "CeeLo Green performing Gnarls Barkley" rather than presenting it as a full reunion. The "To Whom It Still Concerns" tour runs from 5 November through 28 November across North America, with special guests Gallant and Duckwrth appearing on select dates, whilst the duo's third and final album, Atlanta, was released earlier this year.