(CNN) — If Anne Frank had not died a teenager in a Nazi concentration camp in 1945, Justin Bieber hopes she would have been his devoted fan.
That’s what Bieber, 19, wrote in the guestbook at the Anne Frank House when he visited there Friday, according to the Amsterdam site.
“Truly inspiring to be able to come here. Anne was a great girl. Hopefully she would have been a belieber,” Bieber wrote. The tourist site posted the message on its Facebook page .
Adolescent and teen girls obsessed with the Canadian singer are known as “beliebers.”
Bieber, who is in the middle of a European tour, stopped by the Anne Frank House between his concert in Antwerp, Belgium, and a Saturday performance in Arnhem, Netherlands. He told fans on Twitter it was a “chill day.”
Bieber visited the house “together with his friends and guards” Friday night, according to the site’s official Facebook page. The Anne Frank House confirmed to CNN that its Facebook post carrying Bieber’s message was authentic.
“Fans were waiting outside to see a glimpse of him. He stayed more than an hour in the museum,” the Facebook page said.