Beyoncé and Jay-Z celebrated their four-year anniversary yesterday, and today marks another milestone — Beyoncé's Tumblr just launched! She's stocked the site with photos from their personal archives. There are snaps of their globe-trotting adventures, fun times with friends like Gwyneth Paltrow and family, and even some Beyoncé bikini snaps. The couple are all about Tumblr, since they introduced baby Blue Ivy Carter to the world with a site of her own. Click through to see some of the best images from her site!