Abstract-We study how users of multiple online social networks (OSNs) employ and share information by studying a common user pool that use six OSNs -Flickr, Google+, Instagram, Tumblr, Twitter, and YouTube. We analyze the temporal and topical signature of users' sharing behaviour, showing how they exhibit distinct behaviorial patterns on different networks. We also examine cross-sharing (i.e., the act of user broadcasting their activity to multiple OSNs near-simultaneously), a previouslyunstudied behaviour and demonstrate how certain OSNs play the roles of originating source and destination sinks.