Artist: RADIOHEAD

The lyrics:

If I get old
I will not give in
But if I do
Remind me of this

Remind me that
Once I was free
Once I was cool
Once I was me

And if I sat down and crossed my arms
Hold me until this song

Knock me out
Smash out my brains
If I take the chair and start to talk shit

If I get old remind me of this
That night we kissed and I really meant it
Whatever happens if we're still speaking
Pick up the phone
Play me this song