As of 2017, which group has the longest successive No. 1 chart run by a duo or group in the history of the Billboard Hot 100?

On July 30, 2009, Billboard announced that the Black Eyed Peas set a record for the longest successive No. 1 chart run by a duo or group in the Billboard Hot 100's history. "I Gotta Feeling" hit its fifth consecutive week at No. 1, following 12 weeks at the top by the Peas' "Boom Boom Pow". Boyz II Men reigned on the chart for two 16-week runs in the mid-'90s. "Meet Me Halfway" was released as the third single from the album in September 2009. The single reached number one in the UK and Australia, making it their third chart topper from The E.N.D in both countries. It also peaked at seven on the U.S. Billboard Hot 100.

The Black Eyed Peas are an American group, consisting of rappers will.i.am, apl.de.ap, Taboo, and Fergie. Originally an alternative hip hop group, they subsequently changed their musical sound to pop and dance-pop music. Although the group was founded in Los Angeles in 1995, it was not until the release of their third album Elephunk in 2003 that they achieved high record sales. Since that time, the group has sold an estimated 76 million records (35 million albums and 41 million singles), making them one of the world's best-selling groups of all time. According to Nielsen SoundScan, The Black Eyed Peas were the second-best-selling artist/group of all time for downloaded tracks, with over 42 million sales as of the end of 2011.