On Life in Cartoon Motion, his giddy debut, Londoner Mika is an amalgam of nearly every saucy Brit to falsetto his way down the pop pike, from Freddie Mercury to Scissor Sisters' Jake Shears. C'mon, play the matching game! What is ''Big Girl''? An update of Queen's ''Fat Bottomed Girls''! How about ''Relax''? A Bee Gees-ish shout-out to Frankie Goes to Hollywood! Nothing quite matches the crystal-shattering exuberance of hit ''Grace Kelly,'' but singing along doesn't get much cheerier than with this Cartoon.