It looks like they are really talking about pop music as a genre here, as the year end Billboard Top 10 usually only includes maybe one or two songs total from rock, hip-hop, country, etc.
But, if you want to talk fast songs, you would be hard pressed to beat the Power Violence sub-genre (it's kind of like a blend of hardcore punk and metalcore with the tempo taken to the max, with a song structure of "Verse 1 and done"). 23 seconds for the whole song is about the upper limit there... anything longer and a power violence drummer would probably have a heart-attack! (Disclaimer: I don't actually enjoy Power Violence. If you wish to learn more about it, you can use the internet to go afflict yourself with it.)