Complex sentence: Young was popular in Denmark and visited Copenhagen and Aarhus in March 1997, where she was interviewed by major newspapers and TV stations (most famously "NatMadsen" on TV2), while her personal appearances at video shops etc. attracted huge crowds of fans.
Split into simpler sentences: Young was popular in Denmark and visited Copenhagen and Aarhus in 1997. She was interviewed by major newspapers and TV stations (including the talk show "NatMadsen" on TV 2), and her public appearances attracted huge crowds of fans.