"American Idol" was supposed to be Songs of Leiber & Stoller, but the "Idol" producers  decided they didn't have enough songs to fill a whole show.  So Wednesday's "Idol" is now one-half Inspirational Songs, mentored by nobody, and one-half Leiber & Stoller, mentored by Lady Gaga.  It's down to the final 4, but the show last night seemed to lack the spark of previous weeks.Country favorite Scotty McCreery sang Alan Jackson's "Where Were You When The World Stopped Turning" and "Young Blood" by the Coasters. The YouTube video is Scotty's performance of "Young Blood".