#40- DO YOUR DANCE (Part 1) --•-- Rose Royce (Whitfield) #39- MY FAIR SHARE --•-- Seals and Crofts #38- CHANGES IN LATITUDES, CHANGES IN ATTITUDES --•-- Jimmy Buffett #37 - DAYBREAK --•-- Barry Manilow #36 - SEND IN THE CLOWNS --•-- Judy Collins #35- STRAWBERRY LETTER 23 --•-- The Brothers Johnson. American Top 40 (commonly abbreviated to AT40) is an internationally syndicated, independent song countdown radio program created by Casey Kasem, Don Bustany, Tom Rounds and Ron Jacobs. The program is hosted by Ryan Seacrest. Originally a production of Watermark Inc. (later a division of ABC Radio, now Cumulus Media Networks), AT40 is now distributed by Premiere Radio Networks in the United States, Canada, Australia, the Philippines, Singapore, China, India, the United Kingdom, Malaysia and several other territories worldwide. It can also be heard on both the iHeartRadio application and the AT40 Mobile application on mobile smartphones and tablets. Co-creator Casey Kasem hosted the original AT40 from its inauguration on July 4, 1970 until August 6, 1988 and returned to host the revived version from March 28, 1998 to January 3, 2004 (for much of the interim, he hosted the competing Casey's Top 40). AT40's other two regular hosts have been Shadoe Stevens (1988--1995) and current host Seacrest (since 2004). Currently, AT40 with Seacrest airs in two different formats - one for Contemporary Hit Radio and one for Adult Contemporary (formerly Hot Adult Contemporary) stations - with no on-air differentiation other than the charts themselves. Kasem is still heard in two weekly replays of vintage shows from the '70s and '80s, respectively. In its early years, the AT40 used the Billboard charts to compile the countdown, touting it as "the only source". The program subsequently switched to being based on Radio and Records airplay data upon its late 1990s return.[1] Currently the AT40 is based on data from Mediabase, which is also published in the Tuesday Edition of USA Today.

• published: 25 May 2014
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