21 Savage Says Working With Beyonce or Rihanna Would Be a 'Dream Come True': Watch

21 Savage stopped to chat with Billboard’s Chelsea Briggs on the red carpet at the Billboard Music Awards on Sunday (May 20) to discuss the success of his Post Malone collaboration "rockstar," working with Childish Gambino, new music and his a dream to get into the studio with Rihanna and Beyonce.

Asked how he celebrated “rockstar” topping the Billboard Hot 100 chart, 21 Savage jokes, “I forgot. I think I got drunk, probably.”

But he didn't forget about working with Post Malone on the track. “I love him. That’s my brother…We weren’t in the studio when we made [‘rockstar’]. I was on tour, so I just did it on tour. But we’re on tour together now, it’s going great. Everything’s sold out.”

The rapper also talks about being a part of Childish Gambino’s huge new song “This Is America,” telling Billboard, “Me and Childish just sat in the studio for like six hours and just talked the whole night, really. We made a song and I did some ad libs on that song, but we were really just talking the whole time. He a cool dude, and he from my city, so same side of town.”

21 Savage also hinted at new music of his own, revealing that he is currently in the studio with Pharrell making hits. As for when it will be released, he says that is “to be announced.”

He also opens up about wanting to one day collaborate with Rihanna and Beyonce, stating, “I’m just a big fan. That’d be a dream come true to work with Beyonce or Rihanna…I already did something with Nicki, Cardi, so now it’s just Beyonce and Rihanna and I’ll be good.”