This first one is called Lolita Strawberry in Summer sung by a group called SweetS. And its an Ed/Winry video.
The next one is called July 1st by Ayumi Hamasaki.
And this last one is also by Ayumi called Above and Beyond(Remix)
I hope you all enjoy. ^_^
Oh i almost forgot There are SPOILERS if you haven't seen past what is shown on Adult Swim.