 A couple of long-running favorites are ruling the Billboard music charts. Post Malone's country song, I Had Some Help, featuring Morgan Wallen, is back at number one on the Billboard Hot 100 for a six-week. NPR's Anastasios Yulkas has more. Last week, pop star Sabrina Carpenter briefly interrupted Post Malone's reign on the Billboard 100 chart. But now, he and Morgan Wallen are back on top.