Beyonce is working overtime this weekend: After releasing a new song Saturday and performing at the Super Bowl on Sunday, she's announced a new stadium tour.<br />The Grammy-winning singer announced her 2016 Formation World Tour in a commercial after she performed at the halftime show with Bruno Mars and Coldplay.<br />Pre-sale tickets for American Express cardholders go on sale Tuesday; tickets for general public will be available Feb. 15.<br />The singer was last on a stadium tour - the On the Run Tour with husband Jay Z - in 2014, a year after she headlined the Super Bowl halftime show in New Orleans.
