Jay Z made an onstage appearance at Brooklyn’s Barclays Center Friday for the opening night of Puff Daddy’s Bad Boy Family Reunion, a concert that also featured unannounced guests like Nas, Usher, Rick Ross, Ty Dolla $ign and Busta Rhymes.

“You’ve been there with me through my ups and downs. Whenever I get in trouble, this is the one I call. This is my strategist right here, this my brother, this B.I.G.’s brother, this Brooklyn’s own,” Puff Daddy said in introducing Jay Z on what would have been the Notorious B.I.G.’s 44th birthday. “That’s why I appreciate you. He came from 5,000 miles away to come here to Brooklyn to represent for B.I.G.” Jay Z then performed Diddy’s “favorite joint,” “Public Service Announcement.”

Members of the Bad Boy Family in attendance for the kickoff of the label’s 20th anniversary celebration included singer and Notorious B.I.G. widow Faith Evans, Lil Kim, 112, Ma$e, French Montana and, as special guest, Mary J. Blige. (Blige won’t be taking part when the Bad Boy Family Reunion goes on tour starting this August.)