Cirque du Soleil has created a new performance so big, it had to move out of the usual big-top tent and into Philips Arena. On APRIL 2, the troupe of contortionists, acrobats, vaudevillian clowns and aerial dancers begins its three-day Atlanta run of DELIRIUM , a fusion of Cirque's treacherous tricks and urban-beat-driven music with original lyrics, as well as theater and dance. $71.50-$127. 8 p.m. Through April 4. 1 Philips Drive. 404-249-6400. www.philipsarena.com.