Good pictures online?

[Shiva]

So, does anyone know how I can find good pictures online? I found some of one actor I want an autograph from and managed to get some that printed well as 8 x 10's. All the rest I get a message that says it will be printed at less then 220dpi and some other bit that I don't remember at this time even though the picture might blow up well when I enlarge it in photoshop.

It's hard to search for pictures as I get so dang many when I search and one that started big wouldn't even print without giving me that message about the dpi, which I don't even understand as I'm not great with computers.

So if any of you have any suggestions on how to find good pictures for printing, I'd greatly appreciate it.