Dierks Bentley has a greatest hits album on the way, and Trisha Yearwood has a book on "The New York Times" bestsellers list. Both of them also have a chat with Nan Kelley on their calendars, as they drop by tonight's edition of GAC's "Top 20 Country Countdown."

Dierks will release his CD Greatest Hits//Every Mile A Memory 2003-2008 on Tuesday, May 6. The next day, he'll throw a release party at the Charlotte, N.C., club Whiskey River, owned by a guy who's seen plenty of miles: Dale Earnhardt Jr. Trisha, of course, has gotten plenty of mileage out of her new cookbook, Georgia Cooking In An Oklahoma Kitchen, co-authored with her mom and sister. Both Dierks and Trisha have songs currently riding the Top 20 on GAC.

Top 20 Country Countdown counts down the week's top country videos from No. 20 to No. 1 as voted by viewers on each week on GACTV.com. A new countdown premieres every Friday at 8 p.m. ET on GAC and airs again Saturdays at 10 a.m. and 5:30 p.m. ET; Sundays at 1 p.m. ET; and Mondays at 10 a.m. ET. Viewers can vote for their favorite videos, as well as purchase Top 20 artists' albums and ringtones at GACTV.com.

THIS WEEK'S CHART:

1. Trace Adkins "You're Gonna Miss This"
2. Carrie Underwood "All-American Girl"
3. Blake Shelton "Home"
4. James Otto "Just Got Started Lovin' You"
5. Alan Jackson "Small Town Southern Man"
6. Taylor Swift "Picture To Burn"
7. Josh Turner "Another Try"
8. Trisha Yearwood "This Is Me You're Talking To"
9. Lady Antebellum "Love Don't Live Here"
10. Miranda Lambert "Gunpowder And Lead"
11. Taylor Swift "I'm Only Me When I'm With You"
12. Jewel "Stronger Woman"
13. Chuck Wicks "Stealing Cinderella"
14. Gary Allan "Watching Airplanes"
15. Julianne Hough "That Song In My Head"
16. Rascal Flatts "Every Day"
17. Dierks Bentley "Trying To Stop Your Leaving"
18. Phil Stacey "If You Didn't Love Me"
19. Phil Vassar "Love Is A Beautiful Thing"
20. Randy Travis "Faith In You"