INDIANAPOLIS (WRTV) Usher and Chris Brown are bringing The RB Tour to Indianapolis this halloween.The two Grammy-winning superstars will hit Lucas Oil Stadium on Oct. 31.The Saturday night show will run nearly three hours acros s nine acts. Instead of back-to-back sets, the two will trade the spotlight all night long.The production also will feature Mario, Eric Bellinger and Tank as backing vocalists who will also perform some of their own hits.The tour launched in Denver in June. Indianapolis is one of eight newly added dates.HOW TO GET TICKETSThe Artist Presale kicks off Monday, Aug.17 at 10 a.m. ET. Sign up closes Tuesday, Aug. 18 at 10 p.m. ET.The Citi Presale begins Wednesday, Aug. 19 at 10 a.m. Citi cardmembers can access tickets through citientertainment.com.General on-sale starts Monday, Aug. 24 at 10 a.m. at ticketmaster.com. ...read more read less