PHILTON031108_01.jpgBenji Madden PHILTON031108_09.jpg Benji Madden may have gotten wild on tour with Good Charlotte in the past - but now that he's dating Paris Hilton, it's time to learn how to really party like a rockstar!

After wrapping up their day of beauty, we caught the couple stepping out to Villa last night to celebrate Benji's 29th birthday. That's the second time they've commemorated Benji's birth in the last three days!

We couldn't help but notice Benji opening Paris' car door in true gentlemanly fashion, either. How sweet - he may be the birthday boy, but he's giving the best photo op to his girl!