"So Lonely" is a song written and produced by American singer Mariah Carey

Mariah Carey

Mariah Carey is an American singer-songwriter, record producer, and actress. She made her recording debut with the release of her eponymous studio album in 1990, under the guidance of Columbia Records executive Tommy Mottola, whom she later married in 1993...

 and producer Rodney Jerkins

Rodney Jerkins

Rodney "Darkchild" Jerkins is an American songwriter, record producer, and musician. Jerkins received two Grammy nominations in 2011.-Biography:...

. It is a duet between rapper Twista

Twista

Carl Terrell Mitchell , better known by his stage name Twista, is an American rapper. He is known for once holding the title of fastest rapper in the world according to Guinness World Records in 1992, being able to pronounce 598 syllables in 55 seconds...

 and Carey, featured on his album The Day After and Carey's The Emancipation of Mimi

The Emancipation of Mimi

The Emancipation of Mimi is the tenth studio album by American recording artist Mariah Carey, released in the United States on April 12, 2005, by Island Records. Following the relatively poor critical and commercial responses to her albums, Glitter and Charmbracelet , The Emancipation of Mimi...

 (Ultra Platinum Edition). Officially released in 2006 as the third single from The Day After. The version on The Emancipation of Mimi serves as a sequel track to "One And Only" (also featuring Twista), another track from The Emancipation of Mimi and is subtitled "One And Only Part 2". The version on "The Day After" serves as a sequel track to that and is therefore subtitled "One And Only Part 3".

The single unofficially impacted U.S. radio on January 18, 2006, but it had already been added to many radio station playlists and internet websites well before this date (in late September 2005). The single was introduced to iTunes

ITunes

iTunes is a media player computer program, used for playing, downloading, and organizing digital music and video files on desktop computers. It can also manage contents on iPod, iPhone, iPod Touch and iPad....

 as a digital download in late 2005. "So Lonely" reached number 14 on Billboards Bubbling Under Hot 100 Singles

Bubbling Under Hot 100 Singles

The Bubbling Under Hot 100 Singles is a chart published weekly by Billboard magazine in the United States. It lists the top 25 singles below number 100 that have not yet charted on the Billboard Hot 100. Sometimes, however, singles halt their progress on this chart, and never appear on the Hot 100...

 chart, which represents the twenty-five singles below the Billboard Hot 100

Billboard Hot 100

The Billboard Hot 100 is the United States music industry standard singles popularity chart issued weekly by Billboard magazine. Chart rankings are based on radio play and sales; the tracking-week for sales begins on Monday and ends on Sunday, while the radio play tracking-week runs from Wednesday...

's number 100 position that have not yet appeared on the Hot 100. It failed to reach the top forty on the Pop 100

Pop 100

The Pop 100 was a songs chart that debuted in February 2005 and was released weekly by Billboard magazine in the United States until its discontinuation in 2009...

 or Hot R&B/Hip-Hop Songs

Hot R&B/Hip-Hop Songs

Hot R&B/Hip-Hop Songs, is a chart released weekly by Billboard in the United States.The chart, initiated in 1942, is used to track the success of popular music songs in urban, or primarily African American, venues. Dominated over the years at various times by jazz, rhythm and blues, doo-wop, soul,...

 charts, though it appeared on the Rhythmic Airplay Chart

Rhythmic Airplay Chart

The Rhythmic Airplay Chart is an airplay chart that is featured weekly in Billboard Magazine. The chart tracks and measures the airplay of songs played on Rhythmic stations, whose playlist includes mostly hit-driven R&B/Hip-Hop, Rhythmic pop, and some Dance tracks...

. There was no official music video for the single.

There are two versions of the song: one called So Lonely (One & Only Part 2) from The Emancipation of Mimi (Ultra Platinum Edition), which has an extended intro and an additional verse by Carey, and another called So Lonely (One & Only Part 3) from Twista's The Day After, which has a shorter intro and only features Carey singing the chorus and not any verses (subtitled One And Only Part 3).

Charts

Chart (2005)	Peak position
U.S. Billboard Bubbling Under Hot 100 Singles	114
U.S. Billboard Hot R&B/Hip-Hop Songs	65