'J-Lo f*** off!' Steven Van Zandt's wife tweets disgust after American Idol judge forgets name of Bruce Springsteen's guitarist

He's one of the most famous rock musicians in the world but on Thursday night's America idol, Jennifer Lopez couldn't remember his name.

The pop star, who's a judge on the reality competition, found herself struggling to recall that Bruce Springsteen's guitarist Steve Van Zandt was the mentor for the night's performances.

And Steve's wife Maureen was clearly irate, tweeting, according to Billboard.com: 'Really @JLo needs to f*** off.'

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Oops! Jennifer Lopez forgot the name of Bruce Springsteen's guitarist Steve Van Zandt during her American Idol judging duties on Thursday night

Feud: The musician's wife Maureen, pictured with him in December, found the gaffe insulting to her husband and took to Twitter to tell J-Lo to 'f*** off'

Maureen, who's been married to the rocker and Sopranos star since 1982, has since deleted the offending tweets, although some of her other comments relating to J-Lo still remained on her Twitter feed Friday.

She took umbrage at Jennifer's gaffe, explaining:: 'I saw it as insulting. But then it's normal for me to take it personally. She didn't know the mentor's name?'

 

Maureen, 64, also wasn't happy that Jen, 46, seemed to suggest that Steve's mentoring of Mackenzie Bourg was responsible for the Idol contestant performing a cover of Cheap Trick's I Want You To Want Me that she didn't like.

Explanation: Maureen, 64, had deleted many of her tweets by Friday afternoon, although a few remained

Response: The backlash from the pop stars fans was fast and furious, who defended their pop idol

Not impressed: The guitarist's wife said Jen had been 'disrespectful' as the Twitter war simmered on on Friday

She tweeted: 'Shows how little homework she does. Or how little she retains. And Stevie did not do that arrangement.'

'She knows nothing about the rock world. And is a music judge?' she added. 

The row was still simmering Friday afternoon.

Maureen tweeted back to a J-Lo fan account: 'I think part of her job is to know who's coaching the singers she's judging. It's disrespectful to not acknowledge a person's work.'

Famous: Steve is a longtime friend of Bruce Springsteen and has been touring as part of The E Street band since the mid-1970s

Everyone knows his name, right? The 65-year-old is one of the most well-known guitarists in the world; he also found acclaim as Silvio in HBO's The Sopranos

Gave his advice: Stevie was invited to mentor the final five American Idol contestants as they prepared to perform rock covers

Stevie, as the guitarist likes to be called, had been invited by  in-house mentor and Big Machine Records label head Scott Borchetta to mentor the remaining top five American Idol contestants through a theme of classic rock songs.

As Billboard.com reported, ,the rock guitarist wasn't 'feeling' Mackenzie's first rendition of the Cheap trick classic and as the mentor, advised him to try something different.

After her performed his final version live for the judges, the Jenny From The Block hitmaker began her critique, saying: 'I would have liked to have heard what you did originally before...uh, uh... mentor?' she said floundering around.

She turned to her fellow judges Keith Urban and Harry Connick, Jr. for help, with Harry prompting her with 'Steven.'

Classic rock: The offending moment on Thursday's Idol happened after Mackenzie Bourg performed his version of Cheap trick's I Want You To Want Me

Bailed her out: Jennifer had to turn to her fellow judges Keith Urban and Harry Connick, Jr. for help after forgetting The E Street bandmember's name