Christmas Is You" was called "one of the essential musical hallmarks of the holiday season", and is the only holiday song and ringtone to reach multi-platinum status in the US. Occupying three of the thirteen number ones on the album were the singles from Carey's 1995 release, Daydream. The album's lead single "Fantasy", was featured on #1's. However, it was the song's official remix, which featured rap verses from Ol' Dirty Bastard, which made the album cut. This was a personal decision made by Carey, as it was of her preference. The second song from Daydream to be featured on the album was "One Sweet Day", Carey's duet with Boyz II Men. The song topped the Hot 100 for a then-unprecedented sixteen weeks, and held the record for longest running number-one song in Hot 100 history until 2019. The third and final song from the album, "Always Be My Baby", spent two weeks atop the charts in the US, therefore earning a place on the album as well. Carey's most recent studio effort at the time, Butterfly, also yielded two number-one songs. The album's lead single, "Honey", was a career-transitional song for Carey, which introduced her as a hip hop soul artist, as well as featured extended rap verses throughout the song. While very different than anything Carey had ever recorded, the track was described as "street Hip-Hop music, with a booming bass." The second song from Butterfly, "My All", spent one week atop the charts. Carey described the song as "[having] a lush sound and intense styling." Solely written by Carey and Walter Afanasieff, "My All" featured guitar arpeggios, which were synthetically created with the clever use of sampling and playing keyboard notes. As a result, the song was well-received, being called a "slinky, slow jam R&B sound, that fit Mariah like a glove." New material Since Carey intended #1's to serve as a sign of gratitude to her fans, the album contained four new songs not previously included on her albums. The first was a cover of Rainy Davis' "Sweetheart" (1987) performed as a duet with co-producer and rapper Jermaine Dupri. Dupri had worked with Carey in the past, contributing to her album Daydream, and co-produced several hip-hop remixes of her songs. Carey said of the inspiration for its recording, "I was thinking of the old songs I used to listen to when I was in school. It's