Christina's synthy, suggestive debut single ruled the Official Singles Chart this week in 1999.

The hypnotic Number 1 brought Kylie back bigger - and some would argue better - than ever.

It's 18 years since the former S Club 7 singer battled for the top spot with her debut solo single.

Katy Perry's biggest UK hit debuted at Number 1 on the Official Singles Chart this week eight years ago.

Look back and listen to the Top 40 this week, including Human League, Rolling Stones and Bucks Fizz.

We talk to the singer as we look back at her debut single proper.

Usher delivered a stinging Burn to Girls Aloud on the UK singles chart this week in 2004.

There wasn’t a dry in the house as Geri’s departure meant five became four.

Look back at the Top 40 from this week in 2004, including Jamelia, Morrissey and Nelly Furtado.

The first dubstep track to hit the top spot also marked the last time (to date) a Welsh artist has claimed a chart-topping single.

It's been 30 years since Bryan Adams’ unstoppable Robin Hood theme first went to Number 1.

Author Paul Rees recalls the everyman anthem in an exclusive extract from his book When We Were Lions.

Rewind to the Top 40 from this week in 2004, when Britney was at Number 1 and there were new entries from Brandy, Jessica Simpson and Slipknot.

Looking back at the song that launched Nelly's hugely successful Loose album.