Like Al Gore endorsing a democratic candidate (come on, Mr. Gore, just give your props to Barack Obama already), the opinion of a past American Idol on this season's candidates can go a long way toward influencing viewer voting.
With that in mind, consider who Jordin Sparks wants to win:
"Based on last week, David Cook went way up in my book," last year's champion said, obviously impressed by Cook's rendition of Michael Jacksonâ€™s â€œBillie Jean."
Does Sparks watch American Idol regularly?
"I'm an Idol freak!" she added. "I watched the show before I was on it, and I watch now."