Justin Bieber at the Sentul International Convention Center in West Java, Indonesia. Photo: wiki commons.

At least one celebrity has taken umbrage with Justin Bieber’s recent declaration that, had Anne Frank not died in a concentration camp in 1945, he would have hoped to count her among his fans.

Emmy Rossum, a Jewish actress and singer, tweeted: “Anne Frank suffered WW2 and Justin Bieber hopes she would have been a fan? I have no words.”

Bieber, 19, an international singing sensation, visited the Anne Frank House in Amsterdam Friday and wrote in the guestbook: “Truly inspiring to be able to come here. Anne was a great girl. Hopefully she would have been a belieber.”

The comments had Anne Frank as a top trending topic on Twitter Sunday, with thousands of users of the micro-blogging site weighing in on the matter. Some simply responded with disbelief and others used it as an opportunity to poke fun at Bieber and the controversy that has erupted. One twitter user wrote: “Oh dear God. Justin Bieber seems to be increasingly insane. Someone please save him from himself” While another wrote in jest: “One can only hope that Anne Frank indeed would’ve been a Belieber. It’s top of mind for many.”

Others expressed their confusion about why the issue had become a big deal in the first place. One Twitter user wrote: “I really don’t get why it’s a big deal that Justin wrote that he hope (sic) Anne Frank would be a belieber, though.” And another was simply confused by the controversy. “Why have I seen more than one tweet about Justin Bieber and Anne Frank?”