Andrea Neuenhofen (née Rosenbaum; born 25 December 1969), better known by her stage name AnNa R., is a German singer and songwriter who provides the lead vocals for pop group Gleis 8.

She was previously the main vocalist of Rosenstolz, a pop duo that was active between 1991 and 2012 and had chart hits in Germany, Austria and Switzerland.

[7] During their Rosenstolz career, AnNa R. and Plate undertook various initiatives to raise money for AIDS charities, and both were awarded the Bundesverdienstkreuz (Order of Merit of the Federal Republic of Germany) in 2011 in recognition of their efforts.

[10] AnNa R. was the main vocalist of Rosenstolz and also contributed to writing the lyrics of the band's songs with Plate and Ulf Leo Sommer.

[10][12] In January 2012, AnNa R. started working with musicians Lorenz Allacher, Timo Dorsch and Manne Uhlig.