Nicki Minaj welcomes her first child with husband Kenneth Petty, BTS continues night three of their \u2018Tonight Show\u2019 takeover with a performance of \u201cBlack Swan\u201d and Cardi B explains why she waited almost a year before dropping \u201cWAP.\u201d This is Billboard News Now, rounding out the top music news for Thursday, October 1st.\xa0\n\nLearn more about your ad choices. Visit megaphone.fm/adchoices