No, not those kind of birthday suits. Those are already in the game. Unlike Dragon Age, your little naked sackboy doesn't have silly underwear on under his or her clothes. Little Big Planet is one of the few games to sneak full nudity past the ESRB. Subversive!

Anyway, it's Little Big Planet's one-year birthday, so for a limited time you can download a free birthday cake suit and a free limited edition astronaut suit that was only available for a limited time when the game came out. So it's still limited, just not as limited.