Album art on the English wikipedia is under the fair-use licence, meaning that it is not free. If the country you plan to use the artwork in supports fair use than you can use it. If not you can't.
Yes, it is legal, but only if you get it from Google. (its the safest one)
"The cover art was made by Dan Mumford." said wikipedia
yes,lime wire
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.
You can store album artwork in media players such as Apple iTunes, Windows Media Player, WinAmp. Usually, these programs automatically download the appropriate art work when playing a song.
Breakaway - Art Garfunkel album - was created in 1975.
Watermark - Art Garfunkel album - was created in 1977.
Mirage - Art Blakey album - was created in 1957.
The Art of Self Defense - album - was created in 2002.