Kelly Clarkson has been filming her show since returning to Los Angeles earlier this month, but on Saturday, June 27, the singer made her first public appearance since filing for divorce from husband Brandon Blackstock.The “Since U Been Gone” singer, 38, participated in a charity telethon for Project Angel Food, an L.A.-based organization that cooks meals and delivers them to those in need. The “Lead With Love” telethon aired on Saturday via KTLA 5 News.“Hey what’s up, Project Angel Food.