All-4-One is an American R&B and pop group originating from Antelope Valley, California, known for their harmonious ballads and romantic hits. The group consists of Jamie Jones, Delious Kennedy, Alfred Nevarez, and Tony Borowiak. They gained prominence in the 1990s with their Grammy Award-winning single "I Swear," which topped the Billboard Hot 100 for 11 consecutive weeks and became one of the most successful singles of the rock era. Their debut album included other popular tracks like "So Much in Love" and "I Can Love You Like That," both of which achieved significant chart success.

Formed with the help of producers Tim O'Brien and Gary St. Clair, All-4-One initially recorded jingles for a local radio station before releasing "So Much in Love" under Blitzz Records, an Atlantic Records affiliate. The success of this single led to their debut album, which featured original compositions and solidified their place as leading balladeers in the music industry.

Throughout their career, All-4-One released seven albums and sold over 20 million units worldwide. Despite a decline in popularity and a shift from Atlantic Records, they continued to produce music and tour, particularly in Asia. Their music has been featured in various films and soundtracks, including Disney's "The Hunchback of Notre Dame" and "Space Jam."

In 2015, they celebrated over two decades in the music industry with the release of "Twenty+," an album featuring new songs and their greatest hits. All-4-One remains active, continuing to tour and produce music with their original lineup.