"Matches" is a song recorded by American singer Britney Spears and American boy band Backstreet Boys from the 2020 deluxe edition of Spears' ninth studio album, Glory (2016). It was written by Asia Whiteacre, Justin Tranter, and the song's producers Michael Wise and Ian Kirkpatrick. It is a dance, electropop, and glitch pop song consisting of the lyrics describing a dangerous relationship. The single met with positive reception, with critics pointing out the "90's vibe" that the song gives off.
"Matches" was initially intended for the Backstreet Boys' ninth studio album DNA (2019); however, it did not appear on the album. It was later repurposed to be a collaboration between Spears and the boy band, appearing on the 2020 deluxe edition of Glory. Sony Music sent the song to radio airplay in Italy on December 18, 2020, as the third single from the 2020 reissues, and overall fifth and final single for the album. Commercially, it appeared in digital charts in Canada, Germany, the United Kingdom, and the United States, peaking within the top five on the Malaysian RIM singles chart.