Lil Wayne interviewed Eminem last night on his Young Money radio.

During their chat, they realized they both have so many bars that they have to use Google to make sure they don't repeat bars. [Jump to eight minutes.]

"When we first start out, it's just a blank canvas," Em said. "We keep painting until every area is full.  When you've made so many songs about everything.  It gets a little tricky.  The trick is to be able to do the next one with a little twist.  You probably write all the time, and I do too ... You get to the point when you've rapped about everything, you've rhymed every word there is to rhyme."

Wayne then explained that he has so many bars, he can't remember them all.

"If you go through my phone history, my Google history and you press "L" the first that's going to come up is Lil Wayne lyrics. I literally have to google my own lyrics to make sure I didn't already say it."

"Oh my God! Yo, I swear I do that, too.  I just did that sh*t last night," Em agreed.

Wayne added that when some bars you "just "thought of seem to perfect, they probably are.