I finally found these songs from DDR Max: Dance Dance Revolution and DDR Max 2: Dance Dance Revolution. The songs are called "Tomorrow Perfume" by DJ Taka and "Candy". I don't know the artist responsible for "Candy", but I remember that it is the song you hear after you do your 3 stages playing DDR Max, and it appears on DDR Max 2. I can now die happier (This does not give anyone the right to kill me.).