If you have Windows Media Player, this makes it easy. You have to copy the picture you want, then go to the song you want on windows media player and on the the blank album picture that says paste album art here, right click and select paste album art here. Job Done!
When in iTunes, right click on the song/s that you want to add an album artwork to. Then click on Find info. Then go to the tab: Album Artwork. Then click on Add. Then search through your files to find the album artwork that youwant to add to the song/s.
The Art Garfunkel Album was created in 1973.
Naïve Art - album - was created in 1989.
Art Vandelay - album - was created in 2011.
Rock Art - album - was created in 1994-07.
Watermark - Art Garfunkel album - was created in 1977.
Breakaway - Art Garfunkel album - was created in 1975.
The Art of Self Defense - album - was created in 2002.
Mirage - Art Blakey album - was created in 1957.
The Art of Love - album - was created on 2007-05-31.
The Art of Drowning - album - was created on 2000-09-19.
The Art of Dying - album - was created on 2004-05-04.