Although Dwayne Johnson isn't a musician - unless you count that storyline in WWE when he made everyone listen to him playing the guitar badly - he's clearly able to knock out a few bars of song whenever needed.
On the couch with Naomie Harris and Martin Freeman, Johnson explained how young kids are always at him to sing a couple of tunes from Disney's Moana - and, naturally enough, he's able to do it on command because he's future President Dwayne Johnson and will never leave behind an opportunity to delight people in some way.
Would Triple H or Stone Cold Steve Austin be able to do something such as this? Not likely, folks.