Just to remind everyone,tickets for the iHeartRadio Music Festival at the MGM Grand in Las Vegas on September 21 and 22 go on sale at Ticketmaster today at 1 PM EST;No Doubt of course is performing at the event on September 21 along with other artists like Rihanna,Green Day,Usher and Shakira. Ticket prices range from $82.40 to $447.15,including fees. Last year tickets for the festival sold out within a few minutes,so we wish everyone the very best of luck! Don’t forget,there are ways to win tickets here,and for those unable to attend the concerts will be live-streamed on iHeartRadio, Yahoo! and Xbox.