Nicole Richie threw a lavish birthday party last night for boyfriend Joel Madden on the terrace of the Sunset Tower hotel.

The reality star and jewelry designer left baby Harlow at home for the boisterous affair celebrating the rocker’s 30th birthday. More than 35 friends packed the tented terrace, which was closed off for the evening. The terrace—which has a stunning view of the Los Angeles lights—was presided over by discreet yet formidable security.

“There was a lot of laughing and even some speeches,” one nearby diner noted of the party. “Nicole and Joel were nestled in the center of the big group and they looked as happy as they could be to be celebrating with their friends. They were beaming in the soft terrace lighting.”

While the likes of Sharon Stone and Drew Barrymore dined separately inside the restaurant, the rocker-bash carried on enthusiastically outside.

The dinner was three courses and “there was a lot of prime-looking steak” delivered to the table. The highlight of the evening was a rousing rendition of “Happy Birthday” accompanied by a massive birthday cake. “It was so big that I am surprised that thing didn’t set off the fire alarms,” our diner noted.

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