Hello and welcome. I've been looking for the whole interview too but I can't find it anywhere. Only some bits from it. Hopefully they will upload it to an official source soon!
New photos and some international posters
http://movieweb.com/suicide-squad-movie-photos-joker-toys
http://www.comicbookmovie.com/suicide_squad/the-joker-flashes-a-grin-on-cool-new-international-posters-for-a143048
Well, I really don't know if it's an actual song. Knowing that Quincy Jones III produced the music for the show, I think this must be his too as it's the type of beat normally used to bridge scenes together. But, again, just guessing.
Will and Jaden at the 2016 Cannes Lions Festival
http://www.dailymail.co.uk/tvshowbiz/article-3652374/Jaden-Smith-displays-signature-dreadlocks-grunge-style-arrives-happy-dapper-father-2016-Cannes-Lions-Festival.html