For Hollywood stars, underage drinking is a non-issue. It is confirmed by family members that Britney was blowing lines of coke at 16, so I’m willing to bet the farm that even though Hilary Duff had her 21st birthday over the weekend, she probably had her first beer years ago.

When celebrating a 21st birthday, it is standard for girls it hit the town and throw down shots as fast as they can – and Hilary Duff is no different. In a court ruling last month a judge ordered her estranged father to pony up $12,500 for a her birthday bash – that will buy her a little over 100 shots of Remy Martin Cognac Louis XIII. Not like she really needs the money though, as Duff was listed on Forbes’ list of Top 20 Earner Under 25 since 2005, raking in $15 million plus a year.

Anyway congrats to Hilary Duff and good luck to her 28 year-old hockey playing boyfriend, Mike Comrie who will have to deal with her sloppy drunk ass.

Instead of buying Hilary a birthday cake we’ve compiled links to our past COED stories.

• COED Presents: Evolution of Hilary Duff’s Boobs
• Hilary Duff’s Got Back
• The 19 Emerging Hotties of 2008
• Miss COED: Hilary Duff

In celebration of the momentous occasion you should check out the Evolution of Hilary Duff’s Boobs.