His new album, Confessions, flew in straight to number one while his single Yeah held the top spot ahead of DJ Casper's Cha Cha Slide.
New entrants Anastacia, Blue and The Darkness all arrived from nowhere to take the third, fourth and fifth place.
Bad news for Britney's Toxic this week, which slid down from four to six, after being number one three weeks ago.
Usher's double success knocked George Michael's new album, Patience, off the top album spot into second after just one week.
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