We never cease to be impressed with the strides that Colorado producer Frank E continues to make. It's like nonstop! And although he's been producing hits for a nice range of hip-hop artists like Chamillionaire, Plies, T-Pain and Flo-Rida, he's doing the pop thing too. Two singles from pop superstars Madonna and Toni Braxton recently leaked online, both of which Frank E produced. The Madonna song, "Revolver," which also features Lil Wayne, we knew was coming thanks to Madge's announcement herself. The song has the pop-dance sound that pretty much fits Madonna's persona but still remains relevant in today's pop music scope. The Toni Braxton track, "Yesterday," has the power ballad feel that's reminiscent of Beyonce's "Halo" or Leona Lewis' "Bleeding Love." Listen to the tracks after the jump.