The Ying Yang Twins is an Atlanta-based American rap duo consisting of Kaine and D-Roc. They are also popular for their song about the New Orleans Saints football team, "Halftime (Ft. Homebwoi)."

Ying Yang Twins debuted in 2000 with the single "Whistle While You Twurk," which was played on urban and pop radio stations and peaked at No. 16 on the US R&B/Hip-Hop chart. Their full-length debut album, Thug Walkin', came out later that year. Their next album, Alley: The Return of the Ying Yang Twins was released in 2002 and was successful among hip-hop fans in the Southern United States. The same year, the group appeared on the album Kings of Crunk by Lil Jon on the single "Get Low."

Their first album for the label, “Me & My Brother, was certified platinum on April 12, 2005 and yielded three more hits — "Whats Happnin!," "Naggin'" and the popular Lil Jon collaboration "Salt Shaker." The same year the duo appeared on Britney Spears' album In the Zone singing the song "I Got That (Boom Boom)."

A new album U.S.A. (United State of Atlanta) appeared in the summer of 2005 as its singles "Wait (The Whisper Song)," "Badd" and "Shake" were dominating urban radio.

The group's fifth album Chemically Imbalanced was released in November 2006. For this album the Twins collaborated with producers Wyclef Jean and Keith Duplessis in addition to Mr. Collipark, who produced a majority of the songs on the group's previous album. The first two singles were the Hall & Oates-sampling "Dangerous," featuring Wyclef Jean, and "Jigglin'."

In 2008, the Twins released the mixtape The Official Work and a promo single titled "Drop." In 2009, the Twins released their album with Deep Records, “Ying Yang Forever,” and started a tour titled "Ying Yang Forever Tour."

Their song "Halftime (Stand Up and Get Crunk)" is now a standard in many NFL football stadiums, and is considered to be the unofficial anthem of the New Orleans Saints during their Super Bowl victory season.

On November 3, 2009, Ying Yang Twins released their greatest hits album via The Orchard and BOOTY Records. The album includes top ten billboard hits “What’s Happinin”, “Shake”, “Salt Shaker”, and “Wait (the whisper song)” plus three new tracks.

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