Mary J Blige & Usher Bring Down the House at Global Citizen Earth Day 2015

Mary J Blige belts out a tune during 2015 Global Citizen Earth Day on the National Mall on Saturday afternoon (April 18) in Washington, D.C.

The 44-year-old singer was joined by Common, Usher, and Will.I.Am for the event to end extreme poverty and solve climate change.

PHOTOS: Check out the latest pics of Mary J Blige

Also pictured inside: Mary and Jamie Foxx hitting the red carpet for the grand opening celebration of Strip by Strega at Boston Park Plaza Hotel in Boston, MA the night before.

FYI: Mary is wearing an A.L.C. jumpsuit.

15+ pictures inside of Mary J Blige, Common, and more at the big bash…