if you want easy, try green day. pretty much ANY song can be learned in a day.
HOWEVER, if you have a lot of determination, and your fingers can do transitions quick... try dragonforce's Through The Fire And The Flames. I learned that song by ear in a month. not THAT hard.
JK but worth al the effort if you try it out, considering there will be a LOT of techniques used in this song that will greatly enhance your playing skill