Happiness, to me, is a really ASTONISHING pop song.
the instrumental is a GROOVE, the topline she (and Stargate) constructed over it is outrageously catchy (and a perfect fit - something Kylie could not accomplish with her attempt), and Alexis' vocal is simply a pleasure to behold - the sheer elasticity with which she moves from that casual, airy falsetto of the first chorus into the lower register of the verse and then to the BELTING of the second and third choruses... that is a vocalist, ladies and gentlemen. all discerning homos should bow at the altar of this song. it just perfectly encapsulates joy, romance and release.