"Who wrote, often with Howard Greenfield, the songs ""Oh! Carol"" (1959), ""Calendar Girl"" (1960), ""Little Devil"" (1961), ""Happy Birthday Sweet Sixteen"" (1961), ""Breaking Up Is Hard to Do"" (1962) and ""Next Door to an Angel"" (1962)?"
Howard Greenfield which she starred. When, in 1958, Sedaka signed to RCA Records as a solo artist, he and Greenfield composed a string of hits for Sedaka to record – among them "The Diary", "Oh! Carol", "Stairway to Heaven", "Calendar Girl", "Little Devil", "Happy Birthday Sweet Sixteen", "Next Door to an Angel" and the chart-topping "Breaking Up Is Hard to Do". Sedaka's recordings eventually sold a combined 25 million records. As Sedaka's promotional and touring commitments began taking up more and more of his time, Kirshner encouraged Greenfield to collaborate with other Aldon writers. Beginning in 1960, Greenfield began a regular collaboration
Neil Sedaka (No. 27, 1960); "Calendar Girl" (No. 4, 1961; also reached No. 1 on the Japanese and Canadian pop charts); "Little Devil" (No. 11, 1961); "Happy Birthday Sweet Sixteen" (No. 6, 1961); his signature song, "Breaking Up Is Hard To Do" (No. 1, two weeks: August 11 and 18, 1962); and "Next Door to an Angel" (No. 5, 1962). Singles not making the Top 30 during this period included "Sweet Little You" (No. 59, 1961) and "King of Clowns" (No. 45, 1962). RCA Victor issued four LPs of his works in the United States and Great Britain during this period, and