Simplify the following text for a Grade 6 native English-speaking person.
Original: She steps up on a platform , wearing a silver belly top with baggy jeans , and begins singing and dancing the song , causing the DJ , played by DJ Cipha Sounds , to turn the music up and everybody to start dancing .
Simplified: Rihanna steps up and sings the song , causing the DJ to turn the music up and everybody to start dancing .