R&B singer Chris Brown pulls out of a four-concert Canada festival, citing personal and health reasons.

LOS ANGELES, CALIFORNIA, UNITED STATES (UNRESTRICTED POOL) - A four-concert festival in Canada has been canceled after its headliner, R&B singerChris Brown, had to pull out for personal and health reasons, the festival's promoter said on Monday (August 19).

Brown, 24, is on probation in California for assaulting former girlfriend and fellow singer Rihanna in 2009, and has become a polarizing figure after the assault, which took place in Los Angeles on the eve of that year's Grammy awards.

Neither the promoter nor Brown's publicist elaborated on the issues behind the cancellation. But the publicist did confirm that the Grammy winner suffered a non-epileptic seizure on August 9 in Los Angeles.

The decision also comes after some sponsors, including Canadian telecom company Rogers Communications Inc. and Molson Coors Brewing Co., pulled their affiliation with the concert in Halifax, Nova Scotia, after Brown was named as a performer.

An online petition in Nova Scotia protesting Brown performing in Halifax gained more than 16,000 signatures and the city's mayor, Mike Savage, also spoke out against the "Turn Up the Music" singer playing there.

The concert series is to be rescheduled for 2014, the promoter said. The shows were scheduled for Winnipeg, Manitoba; Toronto; Halifax; and Saint John, New Brunswick.

Last week, Brown agreed to complete an additional 1,000 hours of community labor in Los Angeles after his probation was temporarily revoked and he was accused of cutting corners on earlier community labor work.