Play the "Give It Away" song by Red Hot Chili Peppers. There are three solos, and the first one is the easiest. Just play on the solo buttons from the start of the song until you get to it.

Note: This trick requires that you have transferred the songs from Rock Band to Rock Band 2. Select "Wave Of Mutilation" by the Pixies, and choose the guitar on the Expert difficulty. The solo is only about fifteen notes and are orange and blue. Use the solo buttons to play them.