Holy jeez. That’s a lot of giving back. Starting at 6:30 p.m., the second edition of “Idol Gives Back” will feature “Idol” alumni Carrie Underwood, THE VALLEY’S OWN Jordin Sparks, Fantasia, Daughtry, Melinda Doolittle (remember her?) and Elliot Yamin (remember him?). And a bunch of other people, like charitable telethon veterans Robin Williams, Billy Crystal and Whoopi Goldberg of “Comic Relief” fame.