Combine Hollywood's hottest host with America's longest running weekend countdown, and you've got a ratings explosion called American Top 40 with Ryan Seacrest on 104.8 Channel 4FM.

Every week, from the heart of the music business in Hollywood, Ryan exclusively for Channel 4 counts down from Number 40 to the hottest hit song in America. Between the music, listeners take advantage of Ryan Seacrest's insider access to the superstars of music and entertainment, with news and gossip you'll hear nowhere else. Recent guests include: Madonna, Jamie Foxx, Lindsay Lohan, Kelly Clarkson, Beyonce, Kevin Federline, Shakira and Rob Thomas!

More than just the hits, only AT40 brings you the features your listeners want to hear, like: the AT40 MOVIE BEAT, AT40 SLEAZE, AT40 GAME ZONE, AT40 WORLD TOUR, AT40 TREND ALERT, AT40 INSTANT EMAIL REQUEST and the ever popular AT40 BREAK OUT!

Get to hear this definitive countdown from the music capital of the world – Los Angeles each week on 104.8 Channel 4FM.