Illuminate is the second studio album by Canadian singer and songwriter Shawn Mendes. It was released on September 23, 2016, through Island Records and Universal Music Group. Musically, the album contains music genres pop, rock and blues. The album debuted atop the US Billboard 200 and the Canadian Albums Chart. It was preceded by the lead single "Treat You Better", which reached the top 10 on the Billboard Hot 100. This album was supported by the Illuminate World Tour, which began in March 2017.
 
Illuminate debuted at number one on the US Billboard 200 with 145,000 equivalent album units, of which 121,000 copies were pure album sales. It became Mendes' second number-one album in the US and his best sales week. Mendes achieved his second number one at 18 years, two months and seven days old, becoming the fifth youngest artist to score their first two number one, following Justin Bieber, Miley Cyrus, Hilary Duff and LeAnn Rimes. In addition, Mendes is the first artist to have their first two full-length studio albums hit number one since 5 Seconds of Summer bowed at number one with Sounds Good Feels Good (2015) and their self-titled debut album (2014), and the first male artist to claim the distinction since 2015, when ASAP Rocky bowed atop the list with At. Long. Last. ASAP, following 2013’s Long. Live. ASAP.
In his native Canada, the album debuted at number one with 21,000 total consumption units, of which 17,000 were album units sold, surpassing the highest one week sales total reached with his last album, Handwritten. Illuminate also picked up 3.8 million audio on-demand streams, the second highest total of the week, trailing only Drake's Views.