This lists songs that hit number one on the charts in the UK during 1999.
If a song spent nonconsecutive weeks at number one, the number of weeks for each occurrence at the top is shown in parenthesis.
So the information may not exactly match the current version of the data.
You say, different genre but you put the SMURF W/ BEATLES and Madonna. To take just one example, "The Smurf Song" was a national number 1 in Holland, Belgium, and Germany, number 2 in the UK and Austria, and number 3 in Switzerland.
You will also notice that we don't include any genre focused "Pop" charts either.