It is the fastest song in history to reach the milestone.

It's 15 years this week since Kylie ruled the chart with this trippy electronic number - see what else was in the Top 100.

Let Katy be your Witness this Christmas.

Mariah's 30 years of hits, ranked in order of sales and streams.

Plus, Incredibles 2 dashes straight in at 2 as this week’s highest new entry on downloads alone

The series aims to find the world's next big hip-hop artist.

LPs from Kasabian, Amy Winehouse and Coldplay are also included.

Olly's sixth collection You Know I Know combines a new album with his greatest hits.

The star's music comeback is off to a strong start on the Official Chart.