The Marvelettes was an American girl group that achieved popularity in the early- to mid-1960s, and were the first major successful act of Motown Records after the Miracles and its first significantly successful girl group after the release of which 1961 number-one single, a song written by Georgia Dobbins, William Garrett, Freddie Gorman, Brian Holland, and Robert Bateman?
The Marvelettes:  They were the first major successful act of Motown Records after the Miracles and its first significantly successful girl group after the release of the 1961 number-one single, "Please Mr. Postman", one of the first number-one singles recorded by an all-female vocal group and the first by a Motown recording act. Please Mr. Postman: "Please Mr. Postman" is a song written by Georgia Dobbins, William Garrett, Freddie Gorman, Brian Holland, and Robert Bateman.
Please Mr. Postman