Helen boogies with Old Saint Nick from KALICHARAN (1976)
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Kalicharan is your typical 70s Bollywood thriller with the hero disguising himself as a funky n'er-do-well in order to infiltrate the organisation of a nefarious gangster (complete with Blofeldesque canine accompaniment).
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It's hardly classic stuff and Helen's festive frolic is certainly the highlight; including as it does, a wild party, grotesque masks, an all-dancing Mariachi band armed with plastic space guns and some supremely raucous licks from composers Kalyanji Anandji. Their score lifts liberally from Western influences - the opening theme being a blatant rip of John Barry's Girl With the Sun in her Hair (from a 60s shampoo commercial no less!).
For the curious and adventurous amoung you the movie is available on VCD and DVD from UltraIndia.