1. Open iTunes.

2. Select song, right-click mouse and select "Get info".

3. Click "Lyrics" tab. Then add lyrics by:

     - (3.1) Type in,

     - (3.2) or Copy&Paste,

     - (3.3) or Use any iTunes-compatible app that can automatically search and import lyrics.

4. Click "OK" when done.

5. Sync up iTunes to update songs to iPhone/iPad/iPod music folder.