The first song is No Woman No Cry a title that is misleading if you aren't familiar with Jamaican patois. The second "no" is actually "nuh" which corresponds with "don't" for those of you who aren't fans of bastardizing the English language.
Second is Three Little Birds, a song that has special resonance with me because I sang it at camp when I was a child.
Last is One Love, or the unofficial national anthem of Jamaica judging by its appearances on Jamaican tourism adverts.
Happy birthday Bob.