For itunes, once you get the album artwork.....?

once you get the album artwork for itunes(on your CD)...what if it isn't the right cover? for instace, i put it cheetah girls the CD and it uploaded all of my songs. then i got album artwork and it has it as Cheetah Girls one world which is the 3rd one, not the first like i wanted. Do you know how to change it? and i'm pretty dumb so if u could literally take me through the steps. thanks!!!