It's safe to say that 12-year-old Justin's dream came true when Jay Z let him come on stage to rap the "Clique" verse. After holding up a sign that read, "Can I rap for you?" at Jay Z's Greensboro concert on Sunday, Justin joined the rapper in the spotlight for his big arena debut. In one seriously adorable move, the boy paused to take a few deep breaths before rapping, and Jay Z leaned in to interrupt, saying to skip the "drug-dealing part." Even better? After the crowd burst into applause, Justin seized the opportunity to ask Jay Z if he could meet him backstage, too. Check out the sweet clip above.