Looking for some songs?

so im looking for some happy uplifting new songs like jason mraz-im yours kt tunsell- black horse and the cherry tree...a couple songs i want that i dont know the name of are, the song goes: your my ha ha ha ha, and thats all i know.. and the other one (could be the same i have no clue) music video is a girl singing and going through a bunch of colorful dresses? any ideas or help.