Complex sentence: Many young women had imitated artists such as Lady Gaga and Rihanna, who are known for their 1980s style jackets with shoulder pads, and the new wave styles of the 1980s have continued resurgence in mainstream fashion in the 2010s.
Split into simpler sentences: Many young women are now copying artists such as Lady Gaga and Rihanna who are known for their 1980s style jackets with shoulder pads. The new wave styles of the 1980s have made a resurgence in mainstream fashion in the 2010s.