Junior rat pack Jeremy Rosado, Ariel Sprague, Gabi Carrubba and David Leathers roll on 'American Idol'

Young pals Jeremy Rosado, Ariel Sprague, Gabi Carrubba and David Leathers next up on "American Idol," doing "Rockin' Robin" -- some tensions as they try to work through the unfamiliar song. 

"Nice, nice; that was hot, man, I was really, really impressed," says Randy Jackson. Jennifer Lopez likes Sprague's smile, everyone gets individual praise; and are all through!

"We're a family, and we're going to go all the way," Sprague says afterward.

They string Ziederman along a little but in the end they all make it through too. "The choreography was astounding," says Steven Tyler, before telling Ziederman, "you're a skinny little girl so you don't have tailfeathers, but you sure shook them."