Britney invited the marines from the Hold It Against Me music video parody to her Femme Fatale tour, according to Eonline.com.
"I was so moved by the 'Hold It Against Me' video that the Marines of HMLA-169 and VMM-266 REIN made in Afghanistan," said Britney to E!. "It warmed my heart to see our nation's soldiers enjoying themselves to my music. I am honored to have them as guests at my concert this summer. I hope they like my show as much as I loved theirs."
Britney sent care packages to the troops along with handwritten notes to show her gratitude.