Spy photos from the Facebook toga partyPALO ALTO — How was Facebook's toga party, held to celebrate the company's 100 millionth user? We couldn't sit back and just read the status updates. So we sent a Valleywag spy deep inside the social network's headquarters. At last, the answer to the question, "What do you get when you mix 5 kegs of beer and a case of champagne with hundreds of geeks?" Alas, we just missed Zuckerberg — he's not known as a big drinker. But even COO Sheryl Sandberg, known for quashing every sign of fun at the company, showed, and grudgingly allowed herself to be wrapped up in a toga. The photos:

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS

Spy photos from the Facebook toga partyS