here we go. ♪ if i lose myself tonight ♪ wooh, wooh, yeah oh wooh hey yes ♪ ♪ woooh, wooh ♪ wwh, woohs life... simple. easy. awesome. xfinity delivers the fastest, most reliable internet learn more, or get started for $29.99 a month for 12 months. click, call or visit a store today. ♪ heroes >>> all right, everyone, before we go as we wrap up another summer in the park we want to remember someone so essential to putting these summer concerts on each and every week. robert mccalister legendary sound engineer worked for us mixing concerts every friday for the past 16 years. well, he passed away unexpectedly and he is survived by his two son, ian and tyler who have worked with us on these concerts this year so our thoughts and prayers to his family and our thanks for all that he did for "good morning america." >> we certainly are thankful for that. amy, thank you very much. we want to say good-bye to everybody and thank alesso for being here for this final friday in the park with his final song. this is "heroes." [ chanting ] >> hey, guys. you been good? thank you for coming out ♪ we go