Why is Scarlett Johansson in the 'If I Can Dream' house?

Why is Scarlett Johansson helping hot young aspiring " If I Can Dream" actor Ben Elliott rehearse his lines -- in his bedroom?

And why don't you ever see anyone watching TV on the web-based reality show? And what goes on regularly in the "Dream" den involving a saxophone?

Those are just a few mysteries we uncovered (and solved) when we toured the house and met the stars of "American Idol" creator  Simon Fuller's latest brainchild, "If I Can Dream," a web-based reality TV show that lets viewers see what it would be like to be a young person, trying to make it in Hollywood.

Living in a Hollywood Hills home festooned with 63 cameras and mics capturing their every move and sound  24/7 are brunette model Giglianne Braga, aspiring actors Ben Elliot and blonde Kara Killmer, and musician Alex Lambert. whom you may recall from "American Idol."