They are not actually twin brothers. The group debuted in 2000 and rose to mainstream popularity in 2003 collaborating with Britney Spears on her album In the Zone and with Lil Jon on "Get Low". The Ying Yang Twins are a crunk rap duo from Atlanta, Georgia consisting of Eric "Kaine" … They are best known for being featured on Lil Jon & The East Side Boyz hit single Get Low which reached #1 on the Billboard 100. The Ying Yang Twins are an American hip hop duo consisting of Kaine (born Eric Jackson on December 16, 1978, age 41) and D-Roc (born Deongelo Holmes on February 23, 1979, age 41). The Ying Yang Twins are a crunk rap duo from Atlanta, Georgia consisting of Eric "Kaine" Jackson and Deongelo "D-Roc" Holmes.