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American Top 40

American Top 40 is an internationally syndicated, independent song countdown radio program created by Casey Kasem, Don Bustany, Tom Rounds, and Ron Jacobs. The program is currently hosted by Ryan Seacrest and presented as an adjunct to his weekday... Wikipedia
Host: Ryan Seacrest
Announcer: Miles Hlivko
Genre: Music chart show, talk
Original release: July 4, 1970 –; present; (hiatus January 28, 1995 – March 28, 1998)
Other names: AT40
Produced by: Easton Allyn & Jennifer Sawalha (Present); Nikki Wine (1970s); Don Bustany (1970s, 1979–1987); Lorre Crimi (1998–2004)