After the brutal Manchester Attack at an Ariana Grande concert Monday Night, fans of the iconic pop sensation Justin Bieber pleaded the singer to cancel his upcoming British tour dates in fear for a young fan base’s safety.

Canadian singer and songwriter, Justin Bieber, 23, is all set to play in an open-air concert at London’s Hyde Park in July. However, fans have flooded social media begging that his appearance should be brought to a halt both for his fans’ security and for the singer himself.

A user with the handle Mahrukkh commented on the Instagram account of Scooter Braun, Bieber’s manager, “Cancel Justin’s concert in the UK, please! We want him to be safe, please.”

Braun also manages Grande, a former Nickelodeon star whose huge female and teen fan base, many of them out in full swing at her concert in Manchester on Monday night fell to their tragedy when a suicide blast took the life of 22 people and seriously injured dozens.

Ariana flew to Florida on Tuesday to spend time with her family, as reported by the Daily Mail website. Representatives at Grande’s concert did not respond to calls on whether the remainder of her World Tour with future stops in London and Europe would still continue.

Leane Murray, 20, lives in Ireland and has tickets to see Bieber play in a Dublin concert scheduled for next month. But she claims that after Monday’s bombing she is deciding to sell them.

I just don’t want what I would hope to be a great night to end in something like last night,” Murray told Reuters.

It’s frightening to think that it could have been any of us and it really shows that you never know what’s around the corner,” she added.

Touring has been one of the top sources of income for musicians in the past couple of years. Taylor Swift, Bieber, One Direction and Grande are amongst the top earners, with Grande earning more than $25 million from scheduled tours between April 2016-April 2017 and Bieber grossing up to $163 million in 2016.