Video courtesy of muller198
Yep. The 1970s were that awesome.
I had the distinct pleasure of seeing the Osmonds as part of that world tour when it landed them at the Nebraska State Fair and, if memory serves, they all wore those same outfits and played that song, meaning I have seen that live, explaining that short, brief period when I wanted to be Jay Osmond when I grew up. (Pretty sure it was the hat.)
The Osmond Brothers:
Merrill, Jay, Donnie, Alan and Wayne.