Octomom -- Throwing the Octuplets a Rockin' Birthday Party!

It's been three years since Nadya Suleman popped out eight babies and transformed into Octomom -- and now, she's marking the occasion by throwing her little bundles of joy a rockstar-themed birthday bash.

The octuplets were born on January 26th, 2009 -- and we're told the party's scheduled for some time at the end of the month ... with guitar pinatas, glitter tattoos, and novelty VIP passes for everyone.

Sources close to Octo tell TMZ, the kids will all be receiving free sneakers from a kiddie shoe company called Gotta Flurt -- which will be hand-delivered by 16-year-old singer Savannah Phillips, who will also perform.