Bronx natives Jennifer Lopez and Mary J. Blige joined forces at Beyonce's Chime for Change concert. It was Jenny and Mary from the Block!

Lopez had previously performed an energetic medley of her biggest hits, as well as recent chart toppers 'On the Floor' and 'Live It Up,' but the ladies' cover killed it.

The ladies performed a duet of the Beatles' 'Come Together,' belting their BX hearts out, and with good reason: it matched the Chime for Change event perfectly. The Chime for Change concert is designed to raise awareness of discrepancies in education, healthcare and freedom for women worldwide. We think J to the L-O and Mary to the J-Blige did just that.