The history of the number one single has changed dramatically over the decades but the concept has remained the same.
When the number 1 chart was founded in the 1950s, music was on vinyl records.
The 1970s saw the introduction of the cassette tape and CDs were available from the 1980s.
The internet changed the way we listen to music forever in 1993 when Billboard in the USA tracked the first legal music download.
It wasn’t until February 2005 that downloading and streaming music online became mainstream through products like YouTube and iTunes.
Throughout all of this, the battle to get to the coveted number 1 slot is the only thing that hasn’t changed.
Whether you were born in the 60s, 70s, 80s or 90s, we have every single number 1 from those eras.
See how many songs you can remember.
