See the Top 40 from 14 years ago, including S Club Juniors, N*Sync, Missy Elliott and Shakira.

See the Top 40 for this week 19 years ago, including R Kelly, Daft Punk, Blackstreet and Michelle Gayle.

See how the rest of the Top 40 looked this week 15 years ago, including Shaggy, Hear'Say and Lil Bow Wow.

See how the Top 40 looked this week 16 years ago, including new entries from Moloko, Jennifer Lopez and M2M.

This week in 2002, the ultimate battle for Christmas Number 1 kicked off.

It's 11 years since a host of stars got together to re-record a charity classic.

It's 14 years since Daniel Bedingfield scored a Number 1 with his very first single.

Question! It was that very first Number 1 for Bey, Kelly and Michelle with this blockbuster movie soundtrack classic.

Now that's what you call a comeback – it's a decade since Madonna went disco and ruled Number 1.

It's 18 years (!) since Natalie Imbruglia turned from girl-next-door to popstar-all-over – we chat to Nat about her first hit Torn.

It's 14 years since Mis-Teeq's third Top 10 One Night Stand entered the chart. We interview Alesha Dixon about her girl group days.

It's a decade since Sugababes' very last Number 1 with Mutya, the mighty Push The Button.

In 2001, Kylie wins the chart battle as Can't Get You Out Of My Head eclipses Posh's Not Such An Innocent Girl.

It's a full decade since Pussycat Dolls hit Number 1 and made us all hold on to our boyfriends a bit tighter than usual.