Pitbull performs as part of "GMA"'s Summer Concert Series in Central Park; Behind the scenes on the set of "Independence Day"; "Weight Loss Win" series ends with "Body fat scales: how well do they work?"

Actor Scott Speedman (TNT's "Animal Kingdom"); former "Bachelorette" Desiree Hartsock on her new book, "My Fairytale Wedding: Planning Your Dream Wedding Without Breaking the Bank"; animal expert Jack Hanna; Miss USA Olivia Jordan; Princess Diana's private chef, Darren McGrady, shares his memories; a preview of Robin Roberts' interview with R&B singer Bobby Brown on a special edition of "20/20," airing tonight on ABC.