Röyksopp are celebrating their 10th birthday. (The Norwegian duo of Torbjørn Brundtland and Svein Berge released their first album Melody A.M. in 2001, but the guys actually got together and officially formed in 1998.) To celebrate longevity, the twosome have posted a new song, "Happy Birthday," which opens with a sparkly loop of the title/occasion and doesn't vary too much ...