Heejun Han, known for his goofy sense of humor, was kicked off of TV singing contest "American Idol" on Thursday night after his second performance of Leon Russell's "A Song for You" failed to convince judges to keep him on the show.Han, who found himself in the ranks of the bottom three for the second week in a row alongside fellow competitors Hollie Cavanagh and Skylar Laine, appeared disappointed as he shook host Ryan Seacrest's hand after judge Steven Tyler informed him that he was being sent home. Han's departure leaves eight contestants remaining from 10 finalists for the show that has given rise to stars ranging from Kelly Clarkson and Carrie Underwood to Adam Lambert.Seacrest began Thursday's show by sharing tweets from Underwood, Mariah Carey, and others praising the contestants' performances from the previous evening's singing segment, for which contestants chose their songs.R&B singer Eric Benet made a cameo appearance on...