The Rat Pack just got two unofficial new members.   A new “Still G.I.N.” By Dre and Snoop ad features Dr. Dre and Snoop Dogg “meeting” music legends Frank Sinatra and Sammy Davis Jr. The cinematic spot brings the iconic musical artists together through AI.  It aired during last night’s “ Voice” finale, which also marks the conclusion of Snoop’s first season as a coach on the show.