Singles from Verliebt... included the Nena cover "Nur geträumt," "Verrückte Jungs," and "Gib mir noch Zeit" (released as "Just a Dream" and "Give Me More Time" as Blossom).

Before Wagner retired the Blümchen moniker, the greatest hits compilation album Für immer und ewig was released, featuring a previously unreleased song, the promotional single "Es ist nie vorbei," which included a collaboration with Swedish artist E-Type.

Wagner also participated in the 2001 charity single "Die Stadt mit der Nase im Wind" as part of the supergroup Hamburg Allstars.

In the same year, she appeared on the Norwegian rock band Turbonegro's tribute album, Alpha Motherfuckers, performing the song "Are You Ready for Some Darkness" alongside Die Ärzte member Bela B..[5] For this project, which marked a significant shift from her electronic sound to an independent rock style, Wagner adopted the stage name Denim Girl for the first and only time.

Later that year, Wagner released her first and only promotional single under the mononym Jasmin, a cover of "Santa Claus Is Comin' to Town," originally performed by Eddie Cantor.

[6] Wagner also ventured into acting, making cameo appearances in several films, most notably as a race car fan in the 2001 movie Driven, starring Sylvester Stallone.

[8] For her transition to a more mature pop-rock sound, Wagner collaborated with notable German artists and songwriters, including Inga Humpe, Peter Plate, and Uwe Fahrenkrog-Petersen.

That same year, Wagner performed these singles along with other new tracks, such as "Erster Tag," "Sonne in mir," "Schmetterling," "Lieblingslied," and "Hellwach," at the Happy Family event in Mannheim.

[9] Additional songs she presented included "Wann wenn nicht jetzt," "Frei," and "Das Meer ruft meinen Namen" at a concert in Oldenburg.

Additionally, she performed the title song "The Love of My Life" for the motion picture soundtrack of 7 Zwerge – Männer allein im Wald.

In 2010, Wagner reunited with the supergroup Hamburg Allstars for another charity single, "You'll Never Walk Alone", and also recorded the "Check Eins" theme song for the broadcaster ARD.

Her song "Boomerang" (1996) became part of an Internet campaign in early 2010 against Deutschland sucht den Superstar, the German version of Pop Idol.

[19] The return as Blümchen proved to be highly in demand, as tour dates quickly accumulated, leading Jasmin to perform at 22 additional concerts in Germany throughout 2019.

[25] The success of "Herzalarm" also earned Wagner a new chart record, making her one of the few German solo female artists (along with Nena) to have top-40 hits in four consecutive decades.

[26] Additional tour dates were also announced for 2021,[27] including two concerts in Sweden and one in Norway, where Wagner had a number-one hit on the singles chart with her song "Heut' Ist Mein Tag" in 1999.

Throughout her career, Wagner experimented with different genres and styles, such as 2-step ("Automatisch," "U-Bahn"), house ("Immer noch verliebt"), disco ("Ist deine Liebe echt"), reggae fusion ("(You made the) Summer go Away"), and indie rock ("Are you Ready for some Darkness").

Wagner is also known for numerous songs and singles that are covers of other artists, including Paso Doble, Queen, Nena, Sesame Street, Ideal, Rozalla, Eddie Cantor, Ciro Dammicco, Turbonegro, Olivia Newton-John, and Superpunk.