It’s Fab.com’s first birthday. What has this design-centric flash sale site done in the last year?

According to Business Insider, they’ve gained 5 Million Users, sold 1.8 million items, acquired their third startup (Llustre), and launched in the UK.

Those are quite a few accomplishments for a one-year-old.

So out of all 1.8 million items, what has been flying off Fab.com’s virtual shelves the fastest? “A vibrator,” announced cofounders Jason Goldberg and Bradford Shellhammer earlier this week at Le Web London. But not just any vibrator, a FORM from Jimmyjane.

Jimmyjane and Fab. It’s a match made in heaven. Watch the Le Web London interview (vibrators mentioned at 16:43).