Lyrics written by: Beth Homa and Rachel Smith. 
To the tune of  "Our Last Kiss" by Pearl Jam
begin with open chords: G  Em  C  D

Oh Karen Oh Karen it's your birthday!  I hope you are here to stay
You wouldn't tell me what you wanted to get, so I rewrote the words to this previous hit!

G   Em  C   D one more time then them with choppy power chords 2x.

the solo 
e----3--3--2--3--2 |-0--0--0--8--8--8 |-10--10--10-|---3--3--2--3--2 |-0--0--0--8--8--8 |
e---10--8--10--8--5---3 |

 Play open chords and repeat the verse.