Fellow hip-hop artist LL Cool J was being interviewed on DJ Tony Touch's show on Shade 45 when Eminem called in, posing as an aspiring rapper named Jason from Miami.

He challenged the rap veteran to a game of Name That Tune and earned praise from LL after rapping lines from Eat Up Em L Chill and other tracks.

"You sound hot saying the joints!" LL told him. "That sounds like you need to write some bars, homie! You sound good, baby."

But when 'Jason' asked: "Can I drop a little something?" and began to rap lines from Lose Yourself - Eminem's Oscar-winning song from the 8 Mile soundtrack, the true identity of the caller was revealed.