«Step by Step» is the biggest-selling hit single from New Kids on the Block. The lead vocals were sung by Jordan KnightDanny Wood sang «Step 1», Donnie Wahlberg sang «Step 2», Jordan Knight sang «Step 3», Joey McIntyre sang «Step 4», and Jonathan Knight sang «Step 5.»

Written by Maurice Starr, it was a huge worldwide hit, selling over 6.5 million copies worldwide, making it one of the biggest selling singles of 1990. It was the first single from the album of the same name, released on May 10, 1990. The song spent three weeks at #1 on the U.S. Billboard Hot 100 and was eventually certifiedplatinum; it also spent two weeks at #1 in the Canadian Singles Chart, in total «Step by Step» spent five weeks at #1 in the North American charts. It also peaked at #2 on the UK Singles Chart and was also a top 10 hit in the Australian, French, German, Irish and Norwegian charts. «Step by Step» was initially recorded by one of Maurice Starr‘s other groups, The Superiors and was released as a single in 1987.

Donnie Wahlberg‘s brother Mark Wahlberg appears in the video for this song.