In Chapter Seventeen, how does Jay find out about Bri's song On the Come Up and what the song is about?

In Chapter Seventeen, there is a piece on the local news about the riots at Bri's school following the reinstatement of Long and Tate. On the piece, the anchor explains that some people are upset about Bri's song On the Come Up because they feel it incites violence. Jay is shocked and appalled when she hears that Bri wrote and performed the song.