JNS (previously known as the Jeans)[1] is a Mexican girl group that rose to fame in late 1996 and 1997 and continued until 2008.

Initially created in 1994 by band member Patricia Sirvent with five members, after one of them dropped out of the project before the first album was recorded in 1996, the group remained as a four-piece until 2007 when it changed into a three-piece after changes in each of their albums, one of these included Dulce María (from 2000-2002), who would later become part of the successful Mexican pop group RBD.

It was not until the release of their second album in 1998, ¿Por Qué Disimular?, that they achieved their biggest success with the leading single, "Enferma De Amor" (1998), which later became their signature song and their best-known single, with Karla Díaz and Melissa Lopez as the new members.

However, from their third album on, while remaining a fixture in the music scene and still relevant, they never achieved the same degree of success.

In 2007, a compilation album (with an accompanying DVD) was released that included new versions of their best-known songs.