This is what we found on Wikipedia regarding the Everyone Says Hi:

"Everyone Says 'Hi'" is a song by the English musician David Bowie for his twenty-third studio album Heathen (2002). It was written by Bowie and primarily produced by the duo Brian Rawling and Gary Miller, with additional production by Tony Visconti. A pop song, it features a lush and sentimental arrangement, with lyrics meditating on bereavement and denial. The song was released as the second single from the album on 16 September 2002, through ISO and Columbia Records. The single peaked at number 20 on the UK Singles Chart and also reached number 83 in the German Singles Chart. Bowie performed the song live throughout 2002 on the Heathen Tour and on television appearances. "Everyone Says 'Hi'" has been covered by Rawling and Miller under the alias Metro in 2003 and by the German singer Claudia Brücken in 2013.