Around 20,000 copies of his single were snapped up on its first day in the shops, much less than Will Young's debut single Evergreen/Anything is Possible, which sold a whopping 1.1m.
Even Girls Aloud sold 40,000 on their first day, but apart from fellow Popstars: The Rivals band One True Voice, there was very little competition that week.
Loads of singles out this week
David will have to fight off fierce competition from loads of other people if he is going to be number one, including Feeder, Rosie Ribbons, Zoe Birkett, Panjabi MC and Busted.
For more on Feeder's bid to hit the top spot, check out Wednesday's Newsround Lite.