Some people would find it a compliment to be described as '$exual napalm' in bed.

But not Jessica Simpson, who didn't take too kindly to ex-boyfriend John Mayer's unchivarlrous comments about her.

But what better way to gain revenge for her perceived humiliation than to slam the singer on Oprah Winfrey - in front of an international audience of millions.

Hurt: Jessica Simpson fights back tears as she hits out at former lover John Mayer on The Oprah Winfrey Show

Jessica, 29, spoke to the Queen of Chat about how hurt she was when former lover Mayer, 32, told Playboy magazine last month that she was like a drug to him $exually.

He said: 'And drugs aren't good for you if you do lots of them... Yeah, that girl is like crack cocaine to me.

'$exually it was crazy. That's all I'll say. It was like napalm, $exual napalm. Did you ever say, "I want to quit my life and just f***ing snort you?"'

Betrayed: Oprah asks Jessica how she felt after Mayer described her as being like '$exual napalm' in bed

Stunned: Jessica said she doesn't want people to know what she's like between the sheets

He later apologised for opening his mouth and said he'd behaved like 'an a-hole'.

But despite his apology, Jessica is still livid about his remarks and looked visibly upset in her interview with Oprah.

The full interview will be broadcast in the U.S. tomorrow but a sneak-peek trailer shows Jessica telling Oprah: 'I don't want people to know how I am in bed.'

Weight issues: Jessica admits that she struggles with the criticism she faces over her weight

Oprah then asks her if she felt betrayed by Mayer's comments - but Jessica's answer won't be revealed until tomorrow.

Explosive: Simpson and Mayer at an event in New York in 2007

Simpson also opens up about her weight issues and the criticism towards her, which she revealed she often struggles with.

The trailer shows her telling Oprah: 'It's a really hard thing for me to talk about.'

Simpson and Mayer dated on and off for almost a year from August 2006, nine months after she split from her husband Nick Lachey, with whom she starred in the reality TV show Newlyweds.

She returns to our screens on a new reality TV show called the Pride Of Beauty which starts to air in the US on March 15 on VH1.

Jessica may take some comfort in the fact she is not the only ex-girlfriend that Mayer has publicly spoken about.

When he and actress Jennifer Aniston, 41, first split up in August 2008, he held an impromptu press conference outside a New York City gym, revealing that he was the one who ended their relationship.

He said: 'I ended a relationship to be alone because I don't want to waste somebody's time if something's not right. I don't waste people's time.'

He also discussed his brief relationship with actress Jennifer Love Hewitt, who he dated in 2002.