Passage: "What Do You Mean?"  was released as the album's first single on August 28, 2015. It was preceded by a social media campaign, which started on July 29, 2015, where Bieber "commissioned at least one celebrity per day to hold up a sign teasing the new track and counting down the days to its release." Upon release, the song became Bieber's first number one single on the Billboard Hot 100 chart in the United States, debuting at number one on the week listed on September 19, 2015, replacing The Weeknd's "Can't Feel My Face" for one week. It was also his first number-one single in Australia and the United Kingdom, where he also broke a streaming record, while also topping the charts of other eleven countries. The song's music video features "shirtless Bieber in bed with a young woman" and "getting kidnapped and punching around some masked men", as well as appearance from actor John Leguizamo."Sorry" was announced as the album's second single on October 16, 2015. It was released on October 23, 2015. A day before, a music video for the song was released, showing a group of women dancing to the song. The song reached the top of the charts in the United States, remaining at the top for three weeks, as well as the Canadian and the UK charts. Moreover, the single has peaked within the top five in almost every other market, including number one in other six countries."Love Yourself" was first premiered on Zane Lowe's Beats 1 radio show and released digitally on November 9, 2015, in advance of the album's release and later announced as the third official single on December 7, 2015. It entered several national charts after the release of Purpose, and topped the charts in eight countries, including Australia, where it remained for seven weeks at the top, Ireland and New Zealand, spending eight weeks at number-one in Ireland and ten weeks at the summit of New Zealand the United Kingdom, where the song spent six weeks at the top, and the United States, becoming his third consecutive number-one single of the album."Company" was...

Question: When did Bieber's number one hit debut?
September 19, 2015