Atlanta's party rap duo Ying Yang Twins scored a hit with the single "Whistle While You Twurk," which received nationwide airplay on urban and crossover radio stations. Their full-length debut album, Thug Walkin', appeared later in 2000. Alley...Return of the Ying Yang Twins from 2002 sold well down South but it was the duo's 2003 team-up with Lil Jon -- "the king of crunk" -- that brought them nationwide success. The party anthem "Salt Shaker" was a massive club and radio hit and soon had the TVT label chasing the duo to sign. They did, and their first album for the label, Me & My Brother, yielded two more crunk hits -- "What's Happnin!" and "Naggin'." The same year the duo appeared on Britney Spears' album In the Zone and her television special of the same name. In 2004, TVT released the remix-filled My Brother & Me with a bonus DVD of the group's videos. USA (United State of Atlanta) appeared in the summer of 2005 as its single "Wait (The Whisper Song)" was dominating urban radio. ~ Heather Phares, All Music Guide