Awe: Sometimes it accompanies discovery, and sometimes it follows it, but if you're lucky, there's at least one moment on "Idol" that makes listening to Ryan Seacrest's blather almost seem worth it. Nothing's yet surpassed Barrino's first "Summertime" in Season 3, but goosebumps popped when Cook sang the Chris Cornell version of "Billie Jean," when Constantine Maroulis actually survived "Bohemian Rhapsody" and when Aiken built that "Bridge Over Troubled Water."