In 2006 Robbie Williams entered the Guinness Book of World Records for selling 1.6 million concert tickets in just a single day. In connection with which of his concert tours did this happen?

Explanation

Robbie Williams has won several awards throughout his successful solo career. This includes more BRIT Awards than any other artist in music history, a record breaking 18 until 2020. He has also received more ECHO Awards than any other artist ever, a record of 13 until 2020. In 2006 he entered the Guinness Book of World Records for selling 1.6 million tickets of his "Close Encounters Tour" in just a single day.