LISTEN: New Eminem Song & Concert

2011 is starting off right for Eminem fans.

A new track from the Detroit rapper has leaked online, as well as bootleg audio of his entire performance with Jay-Z last September at Detroit's Comerica Park.

The song, an unreleased cut called "Difficult," finds Em still coping with the death of his longtime friend and collaborator Proof, who was shot and killed outside a night club in 2006. "I never got to say you I love you as much as I do / How the fuck am I supposed to get over you?" he raps over piano and a spare beat on the mournful track. Listen below.

Meanwhile, 2dopeboyz has audio of Em's 22-song blowout from Comerica Park, featuring D12, 50 Cent, Drake, Tony Yayo, Lloyd Banks, and Dr. Dre!

These two leaks follow the arrival last week of "Syllables," a scathing critique of hip-hop culture from Dre, Jay-Z, 50 Cent, and Eminem, and "Topless," a new track from Em and Nas. Check out both right here.