I'm not sure who 'Jordan Rockstar' specifically is. There could be many people with that name. Maybe it's a local artist or a person known within a certain community. Without more context, it's difficult to tell the real story.
Often, they are portrayed as charismatic and sexy. For example, in many novels, the rockstar is shown as having a magnetic stage presence that attracts the female lead.
Once there was a rockstar named Jack. He met a girl named Lily at one of his concerts. Lily was a huge fan. Jack noticed her in the front row, her eyes full of admiration. After the concert, he invited her backstage. They started talking and found they had a lot in common. Soon, they fell in love. Their love was like a wild rock song, full of passion and energy.
One of the best is 'Just Kids' by Patti Smith. It gives an intimate look into the New York City art and music scene of the late '60s and '70s, with Smith's relationship with the artist Robert Mapplethorpe at the center. It's not strictly about a rockstar but is filled with that bohemian rockstar - like energy.
Yes, there are likely many 'Naruto is a Rockstar' fanfictions out there. Fanfiction platforms are filled with all sorts of creative takes on existing characters. You can check popular fanfiction sites like FanFiction.net or Archive of Our Own to find such stories.