Heejun Han keeps mocking Richie Law but group advances on 'American Idol'

MIT is saved for last on "American Idol." Heejun Han and the guy they all call "cowboy" -- Richie Law -- are next.

But first, Richie stays behind and talks to the cameras about how he's gonna do his own thing, while the other group members take turns ripping on him. "He has a mouth but he doesn't have an ear, he doesn't listen," says Heejun. 

Finally it's time for them to sing. Heejun starts them off on "Broken Strings" and gets a "beautiful" from Jennifer Lopez. Richie is nothing special. Then Phillip Phillips is next and has the judges smiling. Jairon Jackson ends weakly, but they all get through -- based on their body of work, according to the judges.