Not mellowing with age! Joan Rivers, 79, brands Christina Aguilera 'fatso' during catty appearance on Jimmy Fallon

PUBLISHED: 17:57 EST, 19 June 2012 | UPDATED: 01:57 EST, 20 June 2012

She is famed for her sharp tongue and acerbic wit.

And it seems legendary comedienne Joan Rivers is not mellowing with age, for she stuck her claws into her old foe Christina Aguilera on Late Night with Jimmy Fallon last night.

The 79-year-old television personality was publicising her book I Hate Everyone... Starting With Me on the NBC show, and she made sure she came armed with plenty of material worthy of the title.

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In stitches: Jimmy Fallon could not stop laughing as Joan Rivers slated Christina Aguilera on his show last night

And her old feud with the Dirrty star, who the Joan and Melissa star had previously slated due to her fluctuating weight, proved to be a rich subject for he particular brand of comedy

She said: 'Christina Aguilera, we mentioned that she was fat. I think the joke was, 'cows tip her.'

'I'm In a restaurant, I'm in Spagos with Melissa eating dinner and fatso was across the way.

'She comes lumbering over with that no neck look, I'm like, 'oh no here it comes.'

'She comes over to my table and she says, 'are you gonna finish that?'

Fashion policewoman: She also joked that Winona Ryder had called her to ask about what colours to steal for summer

It is not the first time the Beautiful vocalist has been slammed by the chat show host.

On the set of New York Live last year she dealt another vicious clawing.

She said: 'You look like a pig, she's not just eating apples!'

And she also laid into her that year when she infamously forgot the lyrics to the National Anthem at the Super Bowl, saying: 'How stupid can you get? Christina must have been thinking about food -- that's why she forgot the words.'

But Christina was not the only target dealt a blow by the Fashion Police favourite.

For she also talked about a 'phone call' she received from another star keen to get some style advice.

She said: 'Winona Ryder called me, I thought, 'oh, here we go, because I had said, you know.

'And she said its Winona Ryder, it's spring. What colours should I steal for June.

And I thought that was so wonderful'

Slated: Joan has now called Christina 'fatso' and labelled her a pig due to her weight issues

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Has Joan looked in the mirror lately? How dare she talk about other people? Years ago she used to be funny. Now she's just plain pathetic and I won't watch her anymore. She needs to find a new act or retire - gracefully - if she knows the meaning of the word.

- Tina, Brooklyn, NY, 20/6/2012 19:59

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I find this woman revolting! I think she needs to take a long hard look in the mirror before she criticizes other people!

- AR, UK, 20/6/2012 19:39

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Hmm the joke of this is Joan and her precious daughter look like each other with those bizarre reptile/stretched faces, she's in no position to put anyone down!- Rachel, UK, 20/6/2012 3:13 Perfect, couldn't have said it better, Rachel.

- Jean, USA, 20/6/2012 19:23

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how does this woman have the nerve to call anyone anything? look at the state of her face due to all the surgery she's had, she looks like a stroke victim.

- Scott, Durham, 20/6/2012 18:54

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She belongs in a freak show and that isn't unkind because she chose to look freakish and malformed. She has no idea what is actually funny, she only knows how to poke fun at those she envies. Some like to see others cut down and like Joan's so called humour. She is fast friends with Charles and Camilla, gives lots of money to them so she can dine at palaces.

- Rafe , San Rafael, America, 20/6/2012 18:20

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The one thing that I really like about Rivers is that she is always up front and honest about her opinions. She is correct, Aguilera is one chunky monkey. Aguilera needs to understand that by putting herself in the public eye, knowing that young people will model themselves after her, she has a duty to stay in shape and stay healthy. And for all of those people that defend Aguilera, let's not forget that she was getting on Britney Spears about her weight gain when Spears got overweight.

- Action Bob, The Universe, 20/6/2012 18:01

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I'm afraid it's too late for Joan, she's been foul mouthed, narcissistic, and cruel for decades! It's particularly offensive in an age when bullying is rampant and extreme. I don't find anything about her to be funny OR entertaining!

- L A, U.S.A., 20/6/2012 17:49

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What a old ugly troll!!!!.....she needs to look at herself in the mirror and then talk smack! Let me just say she has NO business talking bad about anyone's looks!

- Edie Collins, Hell, CA, 20/6/2012 17:15

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What a old ugly troll!!!!.....she needs to look at herself in the mirror and then talk smack! Let me just say she has NO business talking bad about anyone's looks!

- Edie Collins, Hell, CA, 20/6/2012 17:14

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Joan has become a nasty old woman. She is the LAST person who should be talking about how people look. Her daughter is unfortunate looking and she herself looks like an alien now. I'm sure a lot of this Aguilera thing was to help her friend Kelly Osbourne get back at Christina cause they have that "you're so fat" feud going on all the time.

- Paula, CA, USA, 20/6/2012 16:30

Click to rate Rating 28

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