There's no particular artist, song or album. What seems to be happening is that any track that didn't chart (eg an album track) and therefore has no chart data to download defaults to four names in the Remote Data List and downloads that. It just happens that the first name in the list contains the lyrics to Sunflowers. If the track is a single that charted, the chart data is entered.
What happened was I put all my library in Playing Now, selected just ChartData and hit Batch. I watched it run for about 30 secs, noticing the word Sunflowers a lot and then stopped the batch. The first dozen or so tracks were all album tracks by Queen, Obituary, Celtic Frost, Crowbar and all contained the lyrics to Sunflowers in the ChartData field. The next track was (Dont' Fear) The Reaper by Blue Oyster Cult and this contained the correct chart data. This was followed by more album tracks that contained lyrics in ChartData until Satisfaction by the Stones is reached and contains the correct chart data.
Do you see what I'm getting at?
Cheers.