She took out a loan to buy her then 16-year-old son the $60 guitar which he used to launch his career.

And at 90, Bruce Springsteen’s mother Adele remains the rock legend’s biggest fan – as she proved at New York’s Madison Square Garden on Monday night.

Rocking out with her son to Ramrod, Adele delighted fans when she was shown on the big screen shaking her rump.

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‘She’s still got the moves!’ Bruce Springsteen’s mother Adele, 90, rocks out as she joins him onstage at Madison Square Gardens in New York on Monday night

Biggest fan: The former secretary took out a loan to buy her then 16-year-old son the $60 Kent guitar which he used to launch his career

Springsteen was playing a sold-out show when he pointed out his mother Adele in a nearby section.

Still rocking out to an extended jam of Ramrod from his classic 1980 album The River, Springsteen walked through the crowd while playing his guitar to find her.

Springsteen danced face-to-face across from his mother, who appeared upbeat and sprightly despite the loud volume and the packed crowd.

Watch Bruce Springsteen dance with mom Adele mid-concert

Mother and son: Rocking out to an extended jam of Ramrod from his classic 1980 album The River, Springsteen walked through the crowd while playing his guitar to find his mother

The rocker then turned around to shake his rear for the audience’s cameras and his mother, at first bashfully, followed suit with a smile.

‘She’s still got the moves!’ Springsteen shouted after kissing her and running back onto stage.

Springsteen, 66, is known to have a close relationship with his mother even though he had strained ties with his father as he grew up in New Jersey.

The Boss shares touching dance with 91 year old lady

Close: Bruce dances with his mother and niece back in 2012

She regularly attends his concerts on the East Coast – and has joined him on stage previously.

The Boss, known for his tales of working-class life in America, is legendary for his energy in concerts which often run for hours without a letup in his enthusiasm.

He has three children with wife of 25 years Patti – singer/songwriter Evan, 25, horse rider Jessica, 24, and fireman Sam, 22.