According to a 5:27 p.m. EST posting on the official Twitter profile of GUNS N' ROSES singer Axl Rose, all previously announced GUNS N' ROSES dates have been "officially cancelled." No further details are currently available.***UPDATE:*** Unlike most of Axl's previous Twitter messages, which were posted using an iPhone, this one came via the "mobile web," suggesting that Rose's Twitter account could have been hacked.*** GUNS N' ROSES made its first U.S. concert appearance in four years Friday night (August 13) when it headlined the fifth and final night of the Rock 'N Rev Festival at the 70th annual Sturgis Bike Rally in Sturgis, South Dakota. GUNS N' ROSES was joined on the bill that evening by original headliner ALICE IN CHAINS, REV THEORY and CHARM CITY DEVILS. According to the Rapid City Journal, GUNS N' ROSES took nearly two hours after ALICE IN CHAINS completed its set at 11:00 p.m. to take the stage. Some people reportedly left, not wanting to wait until Saturday morning for Rose and his band to begin performing, while others tossed beer bottles and cans at the stage. GUNS N' ROSES last toured the U.S. in 2006, and had not played any American shows since the November 2008 release of its "Chinese Democracy" album.