“We Belong Together” is a song by American singer Mariah Carey from her tenth studio album, The Emancipation of Mimi (2005). The song was released on March 29, 2005, through Island Records as the second single from the album. “We Belong Together” was written by Carey, Jermaine Dupri, Manuel Seal, and Johntá Austin, and produced by the former three. As the song samples lyrics from Bobby Womack’s “If You Think You’re Lonely Now” (1981) and The Deele’s “Two Occasions” (1987), several other songwriters are credited. “We Belong Together” is built on a simple piano arrangement with an understated backbeat. The lyrics chronicle a woman’s desperation for her former lover to return.
The song broke chart records in the United States and became Carey’s sixteenth topper on the US Billboard Hot 100. After staying at number one for fourteen non-consecutive weeks, it was placed as the second longest running number one song in US chart history, behind Carey’s “One Sweet Day” (1995). Billboard listed it as the “song of the decade” and the ninth most popular song of all time. Additionally, it broke several airplay records, gathering both the largest one-day and one-week audiences in history. “We Belong Together” also topped the charts in Australia and reached the top two in Canada, New Zealand, and the United Kingdom.