Public Announcement
 United States
Public Announcement is an American R&B group, which was formed in 1991 in Chicago, Illinois, United States. They teamed with singer R. Kelly for their collaboration album Born into the 90's
Public Announcement's biography
Genre: RnB
The onetime backing group for R. Kelly, Chicago's Public Announcement made their solo debut in 1998 with All Work, No Play, scoring a Top Ten hit with the single "Body Bumpin' Yippie-Yi-Yo." Kelly moved on to contemporary R&B stardom while the group remained in semi-retirement until late 2000 when they released their sophomore album, Don't Hold Back. Their third album, When the Smoke Clears, appeared in 2005 on the Boss Entertainment label.

Source: http://www.allmusic.com/artist/public-announcement-mn0000307049/biography