After leaking onto the internet in March, "Think Tank" was released on 5 May 2003 and entered the UK Albums Chart at number one, making it Blur's fifth consecutive studio album to reach the topspot. The album was later certified Gold. "Think Tank" also reached the top 20 in many other countries, including Austria, Switzerland, Germany, Norway and Japan. It was their highest charting album in the United States, reaching number 56 on the "Billboard" 200. The album produced three singles, which charted at number 5, number 18 and number 22 respectively on the UK Singles Chart. After the album was released, Blur announced a world tour with Simon Tong filling in for Coxon.