Janet Jackson's Unbreakable World Tour has postponed a pair of upcoming dates ? Saturday's show in Salt Lake City and Sunday's gig in Denver ? in order to give the singer's voice a break. Jackson concluded her message by promising her fans that she's "gon b alright." No make-up dates for the postponed concerts have been announced yet, but Jackson tweeted, that they "Will be rescheduling Salt Lake and Denver. Keep your tickets! Back to Burn Up Kansas City."