Nothing says, "I'm the birthday girl" like a see-through plastic dress! Now that I've taught you that important piece of birthday etiquette, guess whose 21st bday bash went down in Houston this weekend?

The A-Listers came out (well, most of them kind of had to) for the bash, including Beyonce, Jay-Z, Kelly Rowland, and rumored flame Lil Wayne. More pics courtesy of INDMIX after the jump.

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