Orly? Let's put that to the test and use an example that I have already given, a space shuttle.
Space shuttles have a mass of 2,000 tons (not taking into account mass of passengers, fuel, equipment, et cetera) so in order to figure out how much energy you need to propell it at the speed of light you need only plug it into the formula E=MC2.
Therefore:
E=2,000*180,0002E=2,000*32,400,000
E=64.8*1012
Unless there's something wrong with my eyes, that doesn't look anything like infinity.
Edited to add: This is actually the first time I've used the equation for anything, so do please keep that in mind before you chime in.