The Houston Livestock Show and Rodeo has announced its all-star music lineup for 2006. George Strait will open the concert series on Feb. 28, and Gretchen Wilson will close it on March 19. Other country artists scheduled to perform throughout the 20-day event include Brooks & Dunn, Cross Canadian Ragweed, Pat Green, Alan Jackson, Robert Earl Keen, Toby Keith, Larry the Cable Guy, Lonestar, Martina McBride, Cory Morrow, LeAnn Rimes, Clay Walker, Lee Ann Womack and Trisha Yearwood.