WordNet (r) 3.0 (2006):

song and dance
    n 1: theatrical performance combining singing and dancing
    2: an interesting but highly implausible story; often told as an
       excuse [syn: fairytale, fairy tale, fairy story, cock-
       and-bull story, song and dance]

Moby Thesaurus II by Grady Ward, 1.0:

101 Moby Thesaurus words for "song and dance":
   Broadway musical, Singspiel, act, afterpiece, ballad opera, ballet,
   ballet divertissement, bamboozlement, befooling, bit, bluffing,
   calculated deception, chaser, chorus show, circumvention,
   comedy ballet, comic opera, conning, curtain, curtain call,
   curtain raiser, dance drama, deceiving, deception, deceptiveness,
   defrauding, delusion, delusiveness, divertimento, divertissement,
   dupery, enmeshment, ensnarement, entanglement, entrapment,
   epilogue, exode, exodus, expository scene, fallaciousness, fallacy,
   falseness, finale, flimflam, flimflammery, fond illusion, fooling,
   grand opera, hallucination, hoke act, hoodwinking, illusion,
   interlude, intermezzo, intermission, introduction, kidding,
   light opera, lyric drama, minstrel, minstrel show, mirage,
   music drama, musical, musical comedy, musical stage,
   musical theater, number, opera, opera ballet, opera bouffe,
   opera buffa, operetta, outwitting, overreaching, phantasm, pitch,
   prologue, putting on, routine, scene, self-deception, shtick,
   sketch, skit, snow job, song-and-dance act, song-play, spoofery,
   spoofing, stand-up comedy act, striptease, subterfuge, swindling,
   trickiness, tricking, turn, victimization, vision,
   willful misconception, wishful thinking