Destruction of the Veridian System from Star Trek Generations:
http://www.youtube.com/watch?v=fmIaHAtabSU
I think some of this footage could be spliced into the Hosnian Prime destruction shots to show though that it was the sun itself hit, not the planet(s). In particular, the ground view the sun growing dark and the powerful shockwave (after the Nexus has left the frame) destroying the planet itself. Intercut with reaction shots on the surface and I think an editor could sell it.