I just watched a great live performance of Green Day playing "80" in 1991.
I noticed that in the last chorus, starting at 3:30, Billie changed the words from "if anyone can hear me - slap some sense in me..." to "if adrienne can hear me - slap some sense in me...".
That reminded me of my first Green Day concert in Cologne, 2009, where he changed the lyrics in "2000 Light Years Away" from "she holds my malakite so tight so, never let go - cause she's 2,000 light years away" to "she holds my malakite so tight so, never let go - cause she's 10,000 lightyears away".
It's in the 2nd chorus, starting at circa 1:00.
I think the "10,000 Light Years Away"-thingy shows that he still plays it for Adrienne. If you assume that a "light year" is really a mile, it makes sense since he's even further away from her here in Germany. I found that pretty touching (<- yeah, i'm a guy, shoot me )
Do you have more examples where it gets clear that he is singing for Adrienne?
(I didn't shoot those videos, the 2nd one was the best quality i could find.)