sentences:  Nena, also known as 20 Jahre Das Jubiläums-Album ("20 Years The Anniversary Album") is a studio album by German pop singer Nena.It contains new versions of her hits, some of them are duets with other singers, including Kim Wilde, Joachim Witt and Udo Lindenberg.The album was first released in 2002 with a red cover and reissued with a blue cover in 2003.