b'Billie Eilish and Rosalia finally drop their new collab \\u201cLo Vas A Olvidar." Plus, the "Celebrating America" special featured many powerful music moments and Bernie Sanders stole the show when he went viral from Inauguration day. This is Billboard News Now, rounding out the top music news for Thursday, January 21st.\\xa0\\n\\nLearn more about your ad choices. Visit megaphone.fm/adchoices'