br> Pop singer Rihanna still isn’t feeling well and canceled yet another show. Previously having to “embarrassingly” cancel a show in Boston, she is also being forced to cancel a Baltimore show aswell.br>br> Tuesday’s (March 12) concert in Baltimore, after also missing out on Sunday’s scheduled show in Boston.br>br> After kicking off her Diamonds Tour on Friday at Buffalo, New York’s First Niagara Theater, Rihanna pulled out of Sunday’s show at the TD Garden in Boston. Event promoter Live Nation issued a statement that cited the flu and laryngitis as the reasons Rihanna could not perform, adding that the show would be rescheduled.br>br> Shortly thereafter, she took to Twitter, telling fans she was “embarrassed” about letting them down. “#Boston this is the hardest thing for me to deal with!” she wrote. “I feel like we’ve been waiting on this day forever, and I’m hurt that I let you down.”br>br> She hasn’t tweeted since then, so there’s no message yet for disappointed ticketholders in Baltimore.br>br> According to a review of the Buffalo show in the Buffalo News, the singer appeared in fine form on opening night. Though Rihanna was reportedly an hour late to take to the stage, the sold-out show featured impressive choreography from the singer, her eight dancers, two backup singers and four-piece band.