Natasha spent four weeks at the top of the chart with These Words, but this week she falls to number four.
Green Day are non-movers at number two with American Idiot.
The second highest new entry this week is Groove Armada who are number three with I See You Baby, knocking This Love by Maroon 5 out of the top ten.
Other new entries to the top 20 include Ashlee Simpson who's new in at number 12 with her debut single, Pieces of Me.
The chart is based on the most popular legally downloaded songs on the web.
You can listen to it every Wednesday on Radio 1 at 6pm.
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