Rapper appeared at the premiere of <em>Dope</em>
Film will also feature three songs by Pharrell Williams on its soundtrack
Founding member of rap collective A$AP Mob was found dead earlier this week
Drake, Rihanna and Mark Ronson among artists to pay tribute to A$AP Mob founder
Cause of death yet to be announced
Track is rapper's first single since the release of "Multiply" in October
Rapper called the collective 'one of the greatest young squads in the history of rap'
'I feel like I had to go through the whole Civil Rights Movement just to be comfortable,' said the rapper
Rapper begins to promote follow-up to 2013 album 'LONG.LIVE.A$AP'
A$AP Yams confirms next two releases from group will be new solo material from A$AP Rocky and A$AP Nast