i think shes just doing club shows in cities where rihanna either cancelled, moved the show, or perhaps on nights when rihanna doesnt have a performance

she was scheduled to open for her in phx, but then rihanna moved her show to tucson, so rather than going to tucson, kesha headlined a club gig in phx

which is good, cause i wanted to see kesha, but wasnt going to go to the rihanna show...so kesha doing her own club gig meant that i got to see her live