The Osmonds soon had hits with other light, R&B-style pop numbers like "Double Lovin'" (#14) and "Yo-Yo" (#3). In each of these hits, the formula was the same; Merrill sang lead, and Donny was "co-lead" in essence, singing the "hook" or "chorus" of the song. At this time the Osmonds also recorded several hits that were billed to Donny, the lead soloist on the songs: "Sweet and Innocent" (#7), "Go Away Little Girl" (#1), "I Knew You When" (#9) and "Puppy Love" (#2).