Members of the USAG Bavaria Better Opportunities for Single Soldiers program dressed in World War II-era uniforms as part of the USO's 75th anniversary celebration at the Grafenwoehr, Germany, USO facility, Friday, Feb. 5, 2016. ()

Members of the USAG Bavaria Better Opportunities for Single Soldiers program dressed in World War II-era uniforms as part of the USO's 75th anniversary celebration at the Grafenwoehr, Germany, USO facility, Friday, Feb. 5, 2016. ()

Hundreds turned out to celebrate the USO's 75th anniversary during a celebration the Grafenwoehr, Germany, USO facility, Friday, Feb. 5, 2016. Volunteers handed out food and awards during the two-hour long celebration. ()

A USO volunteer hands out cake during a party celebrating the organization's 75th anniversary at their facility at Grafenwoehr, Germany, Friday, Feb. 5, 2016. ()

Actress Marlene Dietrich spends some time with the troops during a USO show in 1944. (Courtesy of the USO)

Comedian Steve Martin jokes around with U.S. troops during a USO show during Operation Desert Storm in 1991. (Courtesy of USO)

U.S. troops take part in a skit with a member of the Dallas Cowboy Cheerleaders during a USO tour to Bagram Airfield, Afghanistan, on Dec. 23, 2009. (Felicia Juenke/U.S. Air Force)

Comedian Bob Hope jokes with the troops during Operation Desert Shield in 1990. Hope teamed up with the United Service Organizations for 50 years, entertaining troops during every U.S. war, starting with World War II. (Courtesy of USO)

Miss America Judith Anne Ford talks with the troops during a USO Show in 1969. Ford was part of the Miss America USO Show Troupe that toured Vietnam in 1969. (Courtesy of the USO)

A soldier with the 4th Stryker Brigade Combat Team, 2nd Infantry Division, poses with comedian Iliza Shlesinger during a USO tour, Dec. 16, 2012, at Forward Operating Base masum Ghar, Afghanistan. (U.S. Army photo)

Kid Rock entertains 7,000 soldiers at the first USO Show in Baghdad on June 20, 2003. (Michael Abrams/Stars and Stripes)

Bob Hope entertains troops at unknown location during World War II. ()

Marilyn Monroe poses with Pfc. John Fenesy, left, and Cpl. Dick Armstrong at the 3rd Division airstrip in Korea on Feb. 20, 1954. (Bob Jennings/Stars and Stripes)

Santa Claus talks with a group of hospital patients during the Bob Hope USO Christmas Show in December, 1970, in Vietnam. (U.S. Army photo)

Former Denver Bronco quarterback John Elway autographs a football for Master Sgt. Jeannie Helms, right, during the United Service Organizations Holiday Tour at Balad Air Base, on Dec. 14, 2004.. (Marc Barnes/U.S. Air Force)

Jason "Wee Man" Acuna, star of the former TV show, "Jackass" greets troops at the USO Spring Troop visit in Naples, Italy, on March 3, 2015. ()

"Sesame Street" characters appear during the launch of a new show aimed at military families. The USO teamed up with "Sesame Street" to bring the show to Europe in 2011. (Fred Greaves/Courtesy of the USO)