Hey, Gleeks! 'Glee' cast members Kevin McHale, who plays Artie, and Amber Riley, who plays Mercedes, are invading the nationally syndicated radio show 'American Top 40 With Ryan Seacrest' this weekend. McHale and Riley will take over for the ubiquitous Seacrest on Aug. 13 and Aug. 14. That means you have to tune in.

The duo will count down the Top 40 songs of the week, which is to be expected on this show, but they will dress up their hosting gig by sharing inside and intimate details about the upcoming third season of 'Glee,' as well what it was like to film the 3D movie that cruises into the multiplex this weekend. McHale and Riley will also dish about the behind-the-scenes activity on the tour and the series. It's going to be a true 'Glee' fest on the radio this weekend.

The pair will also take questions from fans, ranging from what it was like to work with Britney Spears to which songs are their faves and more!

Riley will also be revealing some information about her upcoming solo album, so this is an edition of 'American Top 40' that is not to be missed. True Gleeks would be remiss to not tune in. So mark your calendars and spend a little time with Artie and Mercedes this coming weekend.