Keane's "Everybody's Changing" definitely has picked up a memory or two.
It really knocked me on my ass (emotionally) because It made me think of life... too much, I think. A lot of my friends are either in the military, pregnant, moved away for good or something else. My 1st GF broke up with me in December 08 after 5 Years. So everytime I hear the song, or I play it on Guitar, It strikes a chord (No pun Intended) with me about how much everybody has changed. Makes me sad, considering I'm doing nothing with my life, I haven't moved from out of my folks house and I'm not dating, I feel like I'm right back to where I was in High School (I'm 19).
The Eagles "New Kid in Town" does it to me as well.
After the breakup (See Above), I've remained Single (I can't replace what was perfect to me, at least, not now), yet my Ex finds guys. It's not the dating other people thing bothers me, it's that I wonder if any of those guys will make her happy, so I listen to "New Kid in Town", it makes me wonder if any "Johnny Come Lately" will make her happy and will they be as happy with her as I was.
Honorable Mentions:
"Desperado" By The Eagles.
"Stairway to Heaven" by Led Zeppelin
and "Day After Day" by Badfinger.