Nick Lachey and fiancee Vanessa Minnillo visited  the Cancer & Blood Diseases Institute at Cincinnati Children’s  Hospital Medical Center Tuesday. They do a special salute with patient  Tyler St. Clair for his girlfriend Libby in the Delta Gamma sorority at  the University of Kentucky.
The salute is at 2:12.  
http://www.youtube.com/watch?v=9sVlimWS2QI