Music meme - Day 21 to 23

[fromageordeath]

Day 21 - A song that you listen to when you’re happy
I had no idea, so I went back to my childhood and...
http://www.youtube.com/watch?v=QprXlfVkpH4 AKA http://www.youtube.com/watch?v=QprXlfVkpH4

Day 22 - A song that you listen to when you’re sad
Similarly...
http://www.youtube.com/watch?v=l0k1EAL0h8s AKA http://www.youtube.com/watch?v=jgA2xo0HYrE&feature=related

Day 23 - A song that you want to play at your wedding
http://www.youtube.com/watch?v=9wFpvRMIIEM