Watch the The G, C, and D Chords online guitar lesson by Jeff Scheetz from Jump Start Rock Guitar
Three more chords that can be heard in many, many more songs. So what is up with that "add9" name??? Don't let numbers after your chords like D7, or A13 worry you. That actually has to do with the way chords are built. We build chords by taking notes out of our Major scale, so when we see numbers, that just means we are also using the 7th or 9th or whatever note of a scale in that chord. It is a little more complex than that - but for now, just think of a G9 chord as a G chord, with just a little different sound added into it.