Darius Rucker braved the icy cold water and took the #icebucketchallenge and in turn challenged Lady Antebellum‘s Charles Kelley, who was also called out by Luke Bryan. Charles called out model/actress Kate Upton, who appears in the band’s video for “Bartender.” The #icebucketchallenge has helped raise more than $2 million for the national ALS Association since July 29th. In addition to Darius, Luke and Charles, folks like Dierks Bentley, Scotty McCreery, Lee Brice, Cole Swindell, Blake Shelton, Adam Levine, Justin Timberlake, Martha Stewart, NBC’s Matt Lauer and Hoda Kotb and even the Kennedy family.