03/04/2014 10:29 BST | Updated 01/06/2014 06:59 BST

Joan Rivers in Deep Water Again

Joan Rivers has caused controversy again by telling Howard Stern that the message given across by Lena Dunham is "Stay fat. Get diabetes".

After previously calling Dunham a "little fat chick", Rivers suggested her apology for that previous comment was meaningless, asking recently how Dunham could "wear a dress above the knee".

Dunham, creator and lead actress of hit TV show Girls, has been praised for her healthy body philosophy, and rejecting pressure to lose weight.

Rivers however sent this message to Dunham: "I'm saying if you look the way you look, Lena - and that's fine and you're funny - but don't say it's okay that other girls can look like this. Try to look better. Try to look better!"

It's not the first time the comedian has caused a stir with her 'humour'. In February 2013, Rivers caused a stir after she labelled Heidi Klum a Nazi.

Commenting on Klum's show stopping gold dress for the Oscars, Rivers remarked, "The last time a German looked this hot was when they were pushing Jews into the ovens".

Many were seriously offended by Rivers' comments. The Anti-Defamation League noted that Rivers, herself a Jew, "should know better".

They were shocked that the comment, "so vulgar and offensive to Jews and Holocaust survivors, and indeed to all Americans" was even allowed to be broadcast.

Rivers herself responded to the criticism, revealing that her husband "lost the majority of his family at Auschwitz" - a fact that makes her joking even more surprising.

She claims that she is simply making a point to "remind people of the Holocaust through humour". This is a particularly controversial statement which some have claimed is simply an excuse for her insensitivity. It does not appear to co-exist harmoniously with the claim on her website that Joan's "compassion and tenacity" helps her "unique brand of humour".

Heidi Klum is not the first victim of Rivers' jokes referencing the Holocaust. After supermarket chain Costco refused to sell copies of her book, I Hate Everything... Starting With Me, she labelled it "like Nazi Germany".

Rivers has also bad-mouthed Adele, calling her "fat". She suggested on the David Letterman Show that the singer should change the name of her song "Rolling in the Deep" to "Rolling in the Deep Fried Chicken".

She continued, "[Adele] is a chubby lady who's very, very rich". Rivers believes that she should slim down or accept the criticism.

Comedian Adam Hills jumped straight to Adele's defence. He called Rivers a "d***" and noting that Adele was "one of the few women in pop music" he wanted his daughter to aspire to be like.

He blasted Rivers' obsession with plastic surgery, calling for her to "get a plastic surgeon to manufacture [herself] a new soul".

In January this year, Rivers called Kim Kardashian's new baby "ugly". She said that, in her opinion, baby North West was "desperately in need of a waxing".

When Kim first revealed pictures of her baby to the world, many commented on North's thick, dark eyebrows. However, many commentators believe that Rivers has gone too far with her comments, which are often found offensive.

Rivers' own website calls her "a force of nature" and an "entertainment legend of unparalleled accomplishment and talent". However, as the world around her shakes with anger at her comments about Lena Dunham's weight, has the self-professed "internationally renowned comedienne" gone too far this time?