Why do some songs NOT have album pictures?

I have the HTC sensation... I have a problem with the music player "Listen" album pictures?

• So I dowloaded an app to download music for free and from there it goes straight into the Listen app which I use to listen to the music .. But recently I downloaded a song by Adele and the album pictures from my other songs all changed into her album picture.. How do I remove her album picture...?????

• Answer:

  I've got one too. I don't know about the app you're using but I've noticed that it can use wrong pictures for the artist or song. If you have a problem with this app delete it. The phone will download music info automatically unless you edit the music preferences. Hook your phone into your computer via the USB, download HTC sync if you haven't already done so, then you can edit, delete any pictures you want from your PC. The phone is very versatile like that. You can delete any picture you want and the phone automatically makes thumbs of all pictures on the phone. So to remove an album picture... connect to your PC, My Computer, HTC, htcmusthumbs, albumarts and then delete it in this folder. Hope it helps! P.S. I think you can get rid of the album art without using a PC by deleting the song.