NEW ORLEANS, LA - FEBRUARY 03: Singer Beyonce performs during the Pepsi Super Bowl XLVII Halftime Show at Mercedes-Benz Super
Kevin Mazur

MadonnaBeyonce and Jennifer Lopez probably command millions of eyeballs on the Internet daily with their photosmusic videos and handwritten notes. But on Sunday, they'll have a reported one billion watching them all in the name of charity.

The divas—along with Florence + The MachineEllie GouldingJohn LegendTimbalandIggy AzaleaRita Ora, rising sister trio HAIM and more to be announced—will all lend support for Sunday's "Sound of Change Live" concert.

The all-star charity concert will be broadcast live on TVs in more than 150 countries.

Everyone will perform—except Madonna, who will be a presenter—for the London gig to raise funds for more than a hundred worldwide projects supporting women and girls. It's not every day the world gets an epic concert to watch in our living rooms.

Get more deets and the coming tune-in info here.