Still rocking it! Joan Jett, 55, shows off her muscular figure in red catsuit as she performs at Santos Party House

She penned The Runaways' Cherry Bomb in 1976.

And 37 years later, Joan Jett still looked toned and taut in her red catsuit as she rocked out Santos Party House in New York Wednesday.

The 55-year-old guitarist - born Joan Larkin - finished off her signature slinky look with a silver belt and Converse high-tops.

Evergreen: Joan Jett still looked toned and taut in her 'Cherry Bomb' red catsuit as she rocked out Santos Party House in New York Wednedsday

Evergreen: Joan Jett still looked toned and taut in her 'Cherry Bomb' red catsuit as she rocked out Santos Party House in New York Wednedsday

The Crimson and Clover singer pulled several faces while performing at the record release for her 10th studio album Unvarnished, which came out September 30.

Joan has a song on Unvarnished called T.M.I., which serves as her comment on modern musicians oversharing on social media sites.

'There used to be something called mystique that was a big part of show business,' Jett recently told Rolling Stone magazine.

Amazing! She penned The Runaways' Cherry Bomb in 1976 and 37 years later Joan has hardly aged at all
Amazing! She penned The Runaways' Cherry Bomb in 1976 and 37 years later Joan has hardly aged at all

Amazing! She penned The Runaways' Cherry Bomb in 1976 and 37 years later Joan has hardly aged at all

I love rock 'n' roll! The Crimson and Clover singer pulled several faces while performing at the record release for her 10th studio album Unvarnished

I love rock 'n' roll! The Crimson and Clover singer pulled several faces while performing at the record release for her 10th studio album Unvarnished

'You always wanted to keep something from people that they wanted to know. When they find everything out about you they go, "OK. I'm moving on to this next person." People devour information.'

The Bad Reputation hitmaker continued: 'I'm trying to not judge it. I'm just trying to comment on it, really. I've always been someone that has had boundaries.

'I realized very early in the Runaways – the writers would always ask us all kind of questions about sexuality, just stupid things that didn't pertain to music. I realized that if I started talking about that stuff instead of the music, that's all they would ask us.'

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On tour: Joan will next take her band the Blackhearts to the Old Concrete Street Pavilion & Amphitheater in Corpus Christi, TX on October 12

On tour: Joan will next take her band the Blackhearts to the Old Concrete Street Pavilion & Amphitheater in Corpus Christi, TX on October 12

Joan will next take her band the Blackhearts to the Old Concrete Street Pavilion & Amphitheater in Corpus Christi, TX on October 12.

The brunette beauty also takes on acting roles in Lock and Roll Forever with Brad Dourif, and National Lampoon Presents: Surf Party with Matthew Lillard.

And next year, Jett will appear in the AA comedy Undateable John alongside Daryl Hannah and Estella Warren.

In stores now: Her 10th studio album Unvarnished came out September 30

In stores now: Her 10th studio album Unvarnished came out September 30

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