Rapper Ludacris has been forced to cancel a forthcoming gig in Boston, Massachusetts, because of poor ticket sales. The Stand Up star - real name Christopher Bridges - was due to play at the Eastern States Exposition on 30 September (07), but the concert has now been pulled due to lack of demand. President of the venue, Wayne MCCary, says the show had to be called off because only 700 tickets for the 6,100-capacity arena had been sold.