Last week's number one, JXL's remix of A Little Less Conversation by Elvis, has slipped down to number three.
But Gareth's chart victory has been dogged by rumours that his record company, BMG, purposely halted sales of the JXL track, to make sure Gareth got to number one. They've invested loads of money in him and want to make sure he gets to the top.
Red Hot Chili Peppers
There's two other new entries in the top 10 - Foolish by Ashanti and Here I Am by Bryan Adams.
The Red Hot Chili Peppers have shot to the top of the album charts with their new CD, By The Way.