The characters featured in the movie lived in space, on a happy "birthday" planet. They were shaped a little like the Charlie Brown character "Snoopy", except with a rounder, (although it may have been a flat heart-nose) red nose; pink skin; and large eye-whites, with a small black dot to denote the iris (as opposed to some other, googly-eyed anime).

It came on a VHS as a movie, I think (Although it wasn't one movie plot, but rather like a few episodes/stories on this one particular VHS.)

I remember each character was based off a horoscope sign. The "Cancer" astrological sign had cute little crab-claws, an accent, and she was the "sexy" one (comparable to smurfette). These gloopy aliens kidnapped her once to make food for them (I think they were called "glub glubs", or they only knew how to say "glub glub".) Well, they lived on a trash-dump planet, so she felt sad that she couldn't find any items to make food with.

I remember a "Leo" character, too. He was really cool and saucy, and of course, he had a lion's tail.

I think I remember another female character, although this one was ditzier, I think... She found this cute little creature, and she took it home and fed it, but it kept getting huge and was going to eat the village out of house and home, so they had to let it go, but luckily; the creature's momma came along and took it away.

The series/movie focused greatly on birthdays, and celebrations, ergo the title.

I appreciate any help at all!

I believe it's called "Star street: The Adventures of the Starkids"

Star Street is a Dutch children's cartoon that was popular both in Benelux and in the United Kingdom. The protagonists were pink big-nosed creatures comically fashioned after horoscopes of the western zodiac and was set on a small star-shaped planet in the outer reaches of the universe. The antagonists were green blobbish creatures known appropriately as blobs governed by an even larger pink blob creature. The cartoon's premise was somewhat similar to The Smurfs and The Care Bears.

i believe it's called "Star street: The Adventures of the Starkids"

Star Street is a Dutch children's cartoon that was popular both in Benelux and in the United Kingdom. The protagonists were pink big-nosed creatures comically fashioned after horoscopes of the western zodiac and was set on a small star-shaped planet in the outer reaches of the universe. The antagonists were green blobbish creatures known appropriately as blobs governed by an even larger pink blob creature. The cartoon's premise was somewhat similar to The Smurfs and The Care Bears.

You are correct!!
You have my thank you, from the bottom of my heart.
I spent about 6 hours with a friend, searching for it all night. I simply couldn't find it.

Thank you again, for taking the time to look and answer! :)

No problem :) I'm glad I could help!