Monday's bombing, which killed 22 people and wounded 64, also resulted in the cancellation of next week's London premiere of the superhero film "Wonder Woman" and increased security for a music festival this weekend featuring pop star Katy Perry in Hull.
Grande, who tweeted earlier this week that she was "broken" by the Manchester attack, had been due to perform on Thursday and Friday at London's O2 arena as part of her "Dangerous Woman" tour.
Both shows have been cancelled, as well as performances in Belgium, Poland, Germany and Switzerland through June 5, her record label said in a statement.
"Due to the tragic events in Manchester the Dangerous Woman tour with Ariana Grande has been suspended until we can further assess the situation and pay our proper respects to those lost," the statement said. "Our way of life has once again been threatened but we will overcome this together."
Concert promoter Live Nation said ticket holders will get refunds. Grande, 23, was unharmed in the attack and was photographed arriving in Florida on Tuesday to be with family and friends.
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