Here is the short little intro tab to I got a feelin'. 
The lead is in drop D. I can't get the exact sound the cd
has, so the sound clip doesn't sound identical to the cd,
but I think the notes sound correct.

e ---------------------------------------------------------
b ---------------------------------------------------------
g ---------------------2-----------------------------------
d --/4-/4-2-0-0---0-/4---4-2-------------------------------
a ---------------------------0-2b----0---------------------
d --------------------------------/4---2-0-------------

The is also played after the chorus in the song body