Last seen bravely trying to block Julia Allison's path to a geek — her brother, Facebook CEO Mark Zuckerberg — Randi Zuckerberg will marry her college sweetheart, Brent Tworetzky, in May. Lucky guy. As Web chanteuse "Randi Jayne," she long ago sang her way into our heart with her music video, Valleyfreude, embedded below. Update: Randi just texted my boss, "Sweet! You just saved me money on wedding invites! ;-)"