Lady Antebellum continue to rule the country album chart with 'Need You Now.' The album holds the No. 1 spot on the Billboard chart for the 18th consecutive week. The group has also set a record on the Adult Contemporary chart with the title track, which has become a huge crossover hit. 'Need You Now' is the longest-running No. 1 song by a country group since Billboard started the AC radio airplay chart 49 years ago! The single has topped that chart for a record 10 weeks, surpassing Rascal Flatts' nine-week stint at the top in 2006 with 'What Hurts the Most.'

Elsewhere on the country chart, the week's highest debut album is Hank Williams III's 'Rebel Within,' which rockets in at the No. 4 spot, with 17, 000 copies sold, according to Nielsen Soundscan. That was also enough to earn Hank III a No. 19 debut on the Billboard 200 album chart. Wynonna also scores a Top 10 debut on the country chart, coming in at No. 7 with 'Love Heals.' The album is available at Cracker Barrel Old Country Stores, with sales supporting the Wounded Warrior Project.

Brooks & Dunn's 'Last Rodeo' TV special no doubt helped the duo climb into the No. 2 spot for the week with '#1s ... and Then Some.' The duo sold 19,000 copies of the hit-filled disc, knocking the Zac Brown Band's 'The Foundation' to No. 3. The Top 5 is rounded out by Carrie Underwood's 'Play On.' Brooks & Dunn also debut at No. 50 with another best-of collection, 'Playlist.'

And although it isn't officially released until next week (June 8), Jewel's new album, 'Sweet and Wild,' debuts at No. 64 on the chart.

Carrie Underwood has another smash single on her hands. 'Undo It' vaults into the top spot on country's digital tracks chart, with 69,000 downloads for the week, knocking Lady A off the top of that chart. Jaron and the Long Road to Love's 'Pray for You' is No. 3, followed by Miranda Lambert's 'The House That Built Me,' and Jerrod Niemann's 'Lover, Lover.'