It was a “Michael” reunion at Colman Domingo’s pre-Met Gala bash at the Faena in New York City on Saturday. Domingo’s co-stars Nia Long, who plays Jackson matriarch, Katherine, and critics favorite, Jaafar Jackson, were both on the scene at the “Put That Sh-t On… Again” bash. A source told us partygoers were congratulating Jackson on his role as his late uncle Michael. They described him as “beautiful and soft spoken. Everyone was telling him how amazing he was,” they said. Colman Domingo reunited with his “Michael” co-stars at his star-studded pre-Met Gala bash. Getty Images for Don Julio Nia Long will make her Met Gala debut this year. GC Images It’s Domingo’s second year hosting his pre-Met bash. Getty Images for Don Julio Don Julio tequila supplied the cocktails and DJ Lina Bradford provided the tunes. We’re told Domingo didn’t leave the dance floor. He and “In Bed with Bevy” host Bevy Smith shimmied all night while former “The Real Housewives of Atlanta” star, Kandi Burruss watched on.…