Where do reality-TV singers go when they've performed their swan songs on the tube? Australia, apparently. Oz's upstart indie label, Astral Records, announced its roster yesterday, and tops on the list were American Idol firebrand Nikki McKibbin and Fame hottie Alex Boyd. The imprint's first release, by 15-year-old rocker Sam Lombardi (think Avril with less gloss and more smarts), is due out this spring.