and from ruben studdard to clay aiken. could the next jordin sparks be waiting in the wings?s out of the rough and onto the biggest stage, there is nothing quite like "american idol." ♪ because i want to make you feel ♪ >> you are not going to hollywood. >> reporter: so you might be watching a future superstar just getting started, or you might be watching someone who will never sing in public again. that's the fun part, and that's why we watch, amy. >> i'm a huge fan, and i'm a huge fan of sizzle-icious. thank you so much for that, chris. that made my friday. the journey begins on "american idol" this sunday at 8:00, 7:00 central right here on abc. let's head back over to rob at the philadelphia flower show now. rob? >>> hi, amy. i'm here with longtime flower friend sam from the horticulture society, and his son alex and middle schoolers from the local area. they are studying water sheds, so you guys got to fact check me on this. so behind me, check this out. this is pretty incredible. a five-layer, 25-foot high waterfall recycling 2,500 gallons of water, and it represents a