No, these 'macho' conservative (sic), 'family-values' guys are not singing -- the microphones aren't even plugged in. What they're doing is 'practicing' for their next visit to the nearest public bathroom.
And what's with those pathetic looking vests? Just like all the people with those phony 'support the troops' decals on all those chickenhawk's bumpers -- if you have to wear a jacket or vest with a bunch of American flags on it - you're no damn patriot. You're just another dressed-up 'conservative' trying to act like you give a shit.