Country star Kenny Chesney celebrated his 40th birthday on Wednesday night (26Mar08) with the help of friends including Tim Mcgraw and Faith Hill. Chesney, the ex-husband of actress Renee Zellweger, welcomed a new decade with a private party at Nashville, Tennessee nightclub Cabana. He was joined by family and a host of famous pals, who also numbered singer Kix Brookes, baseball legend Roger Clemens and NASCAR ace Sterling Marlin. Rockabilly star Jason D. Williams entertained the crowd of 200 well-wishers, and at one point was joined onstage by Hill and Kellie Pickler.