Question: 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?

 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. The Marvelettes was an American girl group that achieved popularity in the early- to mid-1960s.  They consisted of schoolmates Gladys Horton, Katherine Anderson (now Schaffner), Georgeanna Tillman (later Gordon), Juanita Cowart (now Cowart Motley), and Georgia Dobbins, who was replaced by Wanda Young (now Rogers) prior to the group signing their first deal. <SEP>  It is the debut single by the Marvelettes for the Tamla (Motown) label, notable as the first Motown song to reach the number-one position on the "Billboard" Hot 100 pop singles chart. "Please Mr. Postman" is a song written by Georgia Dobbins, William Garrett, Freddie Gorman, Brian Holland, and Robert Bateman.  The single achieved this position in late 1961; it hit number one on the R&B chart as well.  "Please Mr. Postman" became a number-one hit again in early 1975 when the Carpenters' cover of the song reached the top position of the "Billboard" Hot 100.  "Please Mr. Postman" has been covered several times, including a 1963 version by the English rock group The Beatles. <SEP> The Miracles (also known as Smokey Robinson and the Miracles from 1965 to 1972) were an American rhythm and blues vocal group that was the first successful recording act for Berry Gordy's Motown Records, and one of the most important and influential groups in pop, rock and roll, and R&B music history.  Formed in 1955 by Smokey Robinson, Warren "Pete" Moore, and Ronnie White, the group started off as the Five Chimes, changing their name to the Matadors two years later.  The group then settled on the Miracles after the inclusion of Claudette Robinson in 1958.  The most notable Miracles line-up included the Robinsons, Moore, White, Bobby Rogers and Marv Tarplin.  After a failed audition with Brunswick Records, the group began working with songwriter Berry Gordy, who helped to produce their first records for the End and Chess labels before establishing Tamla Records in 1959 and signing the Miracles as its first act.  The group eventually scored the label's first million-selling hit record with the 1960 "Grammy Hall of Fame" smash, "Shop Around", and further established themselves as one of Motown's top acts with the hit singles "You've Really Got a Hold on Me", "What's So Good About Goodbye", "Way Over There", "I'll Try Something New", "Mickey's Monkey", "Going to a Go-Go", "(Come 'Round Here) I'm the One You Need", "Just A Mirage", "If You Can Want", "More Love", "I Don't Blame You at All", "Ooo Baby Baby", The multi-award-winning "The Tracks of My Tears", "Special Occasion", "I Second That Emotion", "Baby Baby Don't Cry", the number-one Pop smashes "The Tears of a Clown" and "Love Machine", "Do It Baby", and "My Girl Has Gone",among numerous other hits. <SEP> "Playboy" is a song composed by Brian Holland, Robert Bateman, Mickey Stevenson and singer Gladys Horton, lead vocalist of the Motown singing group The Marvelettes, who recorded the song and released it as a single on Motown's Tamla imprint in 1962.  The single, led by Horton, is about a man who fools around with a lot of women and the woman who narrates the story warns him to stay away from her due to the stories she heard of him "running around with every woman in town".  Horton is helped out in the song by her Marvelettes cohorts Wanda Young, Georgeanna Tillman, Katherine Anderson & Juanita Cowart.  This was released as the third single by the Marvelettes and was their second top ten pop hit reaching number seven on the charts while reaching number four on the R&B chart.