Colombian pop star Shakira will perform on July 11 in Istanbul.She will perform at the Vodafone Park as part of her sixth world tour being held under the same name as the last album "El Dorado".Tickets for the 12 Grammy award-winning singer began selling at "www.biletix.com". Shakira started her latest world tour on June 3.Reporting by Ayse  Humeyra Buyukovali:Writing by Faruk Zorlu