Sing for the moment

Song for the moment

In the book provisionally named as 'The Fifth Dimension', Sameer has different songs playing in the back of his mind in very key occasions of his life

"Its a Beautiful Day'' by Queen played on his mind on the day his proposal to the girl of his choice was accepted.

On the day, he decided that enough was enough with the girl he was still still trying to win over after she had walked out on him, the song by Pink Floyd kept ringing in his brain. . . "I took a heavenly ride throughout the silence, I knew the moment had begun, for killing the past and Coming back to Life"

This happens often to many people doesn't it? More to the musically inclined, but also to to most others.

Can the sporting few name one song that made the rounds in the brain at some time in their life with their spouse/fiancé around? 

(Please do not include old flames)