This is another play on words puzzle cuz other than jigidis these are about the only ones I can create and or solve. So have fun, remember the theme of HAG, cuz all the titles relate to that. There could be a few anwers that work for an artist. You'll just have to figure that out. Sometimes you'll need to be older (or young at heart) to get the clue, sometimes you'll just scratch your head and hopefully sometimes you'll just start humming along 
So...here's the group or singer and you figure out what song. I even put dashes to help. Apologies if this takes you longer than normal. I kept getting caught up listening to the songs ..hopefully you will too and enjoy.
DR = Digital Root and AS = Alpha Sum
Final is N AB CD.EFG W HIJ KL.MNO
A. Otis Redding _ _ _ _ _ _ _ _ _ _ _ _ DR - 3
B. Pat Boone _ _ _ _ _ _ _ _ _ _ AS/12 - 4
C. The Band _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ DR - 4
D. Grateful Dead _ _ _ _ _ _ DR/2
E. Andy Williams _ _ _ _ _ _ _ _ _ DR
F. TLC _ _ _ _ _ _ _ _ _ _ DR - 2
G. Frankie Ford _ _ _ _ _ _ _ _ _ DR + 6
H. Prince _ _ _ _ _ _ _ _ _ _ AS - 129
I. CCR _ _ _ _ _ _ _ _ _ _ DR/2
J. Rush _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ DR + 1
K. Blake Shelton _ _ _ _ _ _ _ _ _ DR/4
L. Helen Reddy _ _ _ _ _ _ _ _ _ (AS + 14)/24.5 haha sorry I couldn't help myself
M. Linda Ronstadt _ _ _ _ _ _ _ _ _ DR
N. Jim Stafford _ _ _ _ _ _ _ _ _ _ DR-4
O. Don Ho _ _ _ _ _ _ _ _ _ _ _ _ DR - 6