Rihanna’s upcoming Good Girl Gone Bad tour has been extended and singer Ciara will be joining her. Extra dates throughout Europe have been added to the schedule and Ciara has landed the coveted spot of opening act. Now news of Ciara opening for Rihanna is already making waves, as many wonder why Ciara, who has sold more copies of her new CD than Rihanna has, would open for Rihanna rather than the other way around. And though it does seem a tab bit odd at first glance, Ciara will only be opening for Rihanna overseas where Rihanna is by far the bigger star. However, regardless of who is opening for who, I think it’s great to see two sistas hit the road together and I’m sure fans of both of these ladies will feel the same.