Barney and Ted singing “For The Longest Time“ (Acapella) in How I Met Your Mother

In the end of the Episode 20 in season 8 “The Time Travelers“, Barney, Barney in 20 minutes and future Barney singing together with Ted, Ted in 20 minutes and future Ted. It’s of course Neil Patrick Harris as Barney Stinson and Josh Radnor as Ted Ted Mosby as Josh Radnor. ;)