A weird, cute and fun Japanese video with 3D computer graphics (and animations)…
The main character (with turquoise hair) of the video is Hatsune Miku (初音ミク), a character from Vocaloid, a singing synthesizer application software developed by the Yamaha Corporation that enables users to synthesize singing by just typing in lyrics and melody.
The first song is titled “Kurutto, Mawatte, Ikkaiten”, adapted from the ending theme of anime “Sgt Frog” (ケロロ軍曹; Keroro Gunsō). I am guessing that the voice is how the software (or Hatsune Miku) should sound like.
The 2nd song is “Caramell Dansen” by Swedish group Caramell. (Hat tip to reader Brighty)