She performed at carnivals as a child and began her career in 1992 after being discovered by record producer Eugen Römer.

The first single, "Warum nur träumen" ("Why Just Dream"), was a number-one on some radio playlists and stayed in the charts for 15 weeks.

Following the birth of her daughter, she released her fourth album Zwischen tausend Gefühlen ("Between a Thousand Feelings") in 1998, which contains twelve songs.

That same year, she released her fifth album Weil ich verliebt bin ("Because I'm in Love"), of which the single "Vielleicht ein Traum zu viel" reached the third place of the ZDF-Hitparade.

Her single "Du hast mich tausendmal belogen" ("You Have Lied to Me a Thousand Times"), originally published on her album Wo liegt das Paradies, reached the second place of the GEMA Top 10 of collected international sales in 2007.

In October 2010, Berg released the album Schwerelos ("Weightless"), which was produced by Dieter Bohlen and thus ended her 17-year-long collaboration with Eugen Römer.

[21] At the preview of her tour for Seelenbeben at the Rittal Arena Wetzlar, Berg received burns on her shoulder and upper arm following a pyrotechnics accident.

[23] On 17 March 2018, Bohlen informed Berg per email that he was ending their professional relationship and would not produce her future albums.

[26] In 2007, she married sports agent, hotelier, and SG Sonnenhof Großaspach co-founder[27] Ulrich Ferber.

[29] From 2002 to 2007, Berg won the Goldene Stimmgabel every year, as well as the Amadeus Austrian Music Award for best schlager album in 2004 and 2005.

On 3 November 2008, she was awarded the Federal Cross of Merit by President of Germany Horst Köhler for her hospice work during a ceremony at the Bellevue Palace.

[4] Reviewers often criticise "the textual and musical randomness of Berg's songs, which almost always follow a simple 1-2-1-2 dance rhythm".