Songfacts®:

• "Omigod You Guys" is the opening number from the musical Legally Blonde, which like the rest of the score was written by the husband-and-wife team of Nell Benjamin and Laurence O'Keefe, who adapted it from the book by Heather Hach.
  
  The song is sung to celebrate the engagement of the heroine Elle to Warner Huntington III, who dumps her because she is blonde. (In Britain, blonde can mean dumb blonde, which is the clear inference here). Elle decides that to win her love back she must show she is not so dumb, enrolls in law school and proves her point, although she ends up in the arms of someone else.
  
  The opening number - which is sung by Elle, her girlfriends and the company - sets the scene for the rest of this award winning family show. >>>

  Suggestion credit:
  Alexander Baron - London, England
• The phrase "Omigod You Guys" reached its cultural zenith at the 2000 Grammy Awards when Christina Aguilera accepted her trophy for Best New Artist with the words, "Omigod You Guys - I seriously do not have a speech prepared whatsoever." It quickly became ingrained in the lexicon of teenage girls, and when texting rose to prominence, one of the first shorthand initialisms was, of course, OMG.