A song that needs no introduction (hopefully):
Whitesnake - Here I Go Again
It's fairly obvious why this video really helped launch this (magnificent) song into single-success orbit - and I'm not talking about Tawny Kitaen doing splits and kavorking across two cars. The band actually looks like it's enjoying what they do, and David Coverdale has an almost unmatched presence.
It also helps that Coverdale has one of the best voices in hard rock and that at this point in time, his band was successful enough to allow him to hire any musician he pleased. Depending on your point of view, that was either great - as it allowed him to hire such luminaries as Steve Vai, Rudy Sarzo and Adrian Vandenberg -or it sucked, because his old pals from the blues rock era got the old heave-ho.