Kellie Pickler is preparing for a USO trip in early 2010, according to her Twitter account. "Started packing for my USO Tour. Think I'm gonna leave the Red High Heels at home for this trip. It's easier to jump in/out of helicopters in flats," she wrote on Sunday (Jan. 3). Although specific details are not announced in advance for USO tours, Pickler will entertain troops internationally along with Jamey Johnson and Randy Houser. She will be an opening act for Taylor Swift on March 4 in Tampa, Fla.