article_snippet: Madonna, Beyoncé, Rihanna and Alicia Keys teamed up to convince the world to fork out for a service that lets the public listen to Madonna, Beyoncé, Rihanna and Alicia Keys songs on the internet.
article_snippet: Material girls: Rihanna, Alicia Keys, Madonna, Beyoncé, Rihanna and Alicia Keys launch the online music service in New York before the backlash began .
article_snippet: Pictured: Usher, Rihanna, Nicki Minaj, Madonna, Deadmau5, Kanye West, Jay Z,  and J.Cole at the event .
article_snippet: The line-up included rap star Kanye West, 37, Nicki Minaj, 32, and Usher, 36 – along with pop royalty Madonna 56, and Rihanna, 27.
article_snippet: British stars Calvin Harris, 31, and Chris Martin, 38, appeared via video link.