STORY: Finn had a crush on PB, but she didn't like him in that way at all.....he met Flame Princess, and started going out with her, when he got serious with Flame Princess, PB realised that she liked Finn, but, it was too late! PB got jealous of Flame Princess, she eventually worked up the courage to talk to Finn about it...after she told Finn, he was angry, he said to her "NOW YOU LIKE ME!?!? I'M FINALLY READY TO MOVE ON, AND YOUR GONNA BUILD ME UP ALL OVER AGAIN!!!!!!!!!!" PB got over Finn (eventually). After about a year of Finn and Flame Princess dating, Finn made a big mistake and Flame Princess dumped him....he needed someone, he then saw a flashback of him and PB and realized that he needed her.....he told PB, she said "Finn...I'm not too sure....when you said those things ages ago, it really hurt me....and I'm afraid that if I go out with you and we start dating...I'll end up getting hurt even more! I'll think about it...." Finn was always anxious in case she said no, after about 1 week, PB ordered him to the palace, she said to him "Finn? I thought alot about it and I think that we should give it a try....I realized that if we're meant to be, it'll happen, if we're not, then....thats it" and thats how they came to be!
Why I picked the song: Because the story is that PB didn't want Finn and when he has a GF, she does, so she is saying that she needs to be with him just one last time! And she just wants to explain everything to him!!!