Sales of songs determined 75% of the sorting information, and radio airplay figures were responsible for 25%.
Chris Brown, Eminem, and the Black Eyed Peas each had five of their singles go to number one.
Scribe's double A-side "Stand Up"/"Not Many" spent the longest at number one, with twelve weeks.
[6] "Axel F", by Crazy Frog, and "Brother", by Smashproof and Gin Wigmore each had eleven weeks at the top spot.
"Brother" broke the record for the longest consecutive number-one reign by a New Zealand artist, previously set by "Sailing Away" by All of Us in 1986.