I won a Popmaster MP3 player which I use when on the National Express visiting my GD. It makes me feel quite modern! I love most music so it's hard to choose but here are a few of my emotion stirring tracks....
Sad songs (to be avoided unless I need a good cry);
Slipping Through My Fingers, ABBA (for my long lost daughter)
Landslide, Stevie Nicks (ex OH)
Keep Forgetting We're Not In Love Anymore, Michael McDonald (ditto)
Feelgood Songs (work every time); 
Do Anything You Wanna Do, Eddie & Hot Rods (I'm 17 & DJ-ing again!)
Rock DJ, Robbie Williams
Superstition, Stevie Wonder (and most of his other songs)
Radar Love, Golden Earring
Sugar Sugar, The Archies
Cecilia, Simon & Garfunkel
Help Me Rhonda, Beach Boys
Any upbeat Motown tracks
I could go on but it's past midnight and this nana needs mucho beauty sleep!