P!nk spent Memorial Day honoring the service of America's veterans, including her dad, Jim Moore, who served in Vietnam. After celebrating last year by inviting Moore on stage at a February gig in New York where they dueted on a song her dad wrote during the war, "I Have Seen The Rain," P!nk posted the clip on Monday (May 25) to pay tribute to everyone who has served the nation. "Thinking of all the soldiers and veterans