During the season finale of American Idol on May 17, a number of past Idol stars appeared on the show for a special rendition of “We Are the World.” Idol alum Scotty McCreery, Lauren Alaina, Kellie Pickler, Laine Hardy, Gabby Barrett, Alejandro Aranda, Jordin Sparks, Katharine McPhee, Phillip Phillips and Ruben Studdard appeared in a…