I featured these artists in a previous Soundtrack but I'm getting a bit obsessive and evangelical.
Puffy Ami Yumi and Tokyo Ska Paradise Orchestra - "Hazumu Riz"
This is like when two superheroes team up in comic books - except this time it's to battle mediocre pop music not supervillains.
Ai Otsuka - "Chu-lip"
This is about Ai worrying about fancying a man who looks like her dad but deciding that theories don't matter and love is all that counts. Tulips are some sort of strange metaphor for love. Very bizarre video and very catchy song.