Pop music originated in the 1950s and 1960s from rock and roll, borrowing elements from various styles like urban, dance, rock, and country. Over the years pop music has become louder, more energetic, and electronic as it has moved away from traditional acoustic instruments. Popular classic artists include Michael Jackson and Beyoncé, while modern pop stars are Miley Cyrus, Taylor Swift, Rihanna, and Lady Gaga. Originally targeting teenage girls aged 16-21, the audience for pop has grown older and now includes people in their 20s and 30s, with more variety for male listeners as well.