.........Step By Step by New Kids On The Block. The boy band craze was in full effect in 1990 and NKOTB was right at the front of the line. Step By Step was the first single form their album of the same name and it was a huge hit. It spent three weeks at #1 on the Billboard Hot 100 and topped the charts in Canada as well, hitting the top 10 in several countries around the world. The single went double platinum and was the groups biggest seller of all time. And yeah, that's Marky Mark, New Kid Donny Wahlberg's brother, making an appearance in the video holding a basketball. Enjoy the #1 song from 25 years ago today, Step By Step.