Here's a contest for finale tickets. The odds are somewhere beyond long, but the sweepstakes itself is legitimate. You can enter up to five times a day -- but counting today, there's only three days left to enter. https://cocacola.promo.eprize.com/naturallythebest/:b=firefox3/
The codes required for entry can be found here:
http://slickdeals.net/forums/showthread.php?sduid=516882&t=2797989
Beyond that, given how close the deadline is, your best bet may be radio call-in shows in the Los Angeles area. Or as a last resort, you could go to www.americanidol.com/ and ask them what contests are available to you. (Presuming anywhere there knows anything may be worse odds than the sweepstakes, but it doesn't cost anything to try.) Just remember that anything you find will likely have very little time left to play with -- and as always, your chances svck.
But as long as the entries are free...