Howard Stern stopped by "Late Night" on Monday night, and gave host Jimmy Fallon an earful of advice about his upcoming gig hosting "The Tonight Show" in February.

Barely letting Fallon have a word in edgewise, Stern (who was once rumored to replace Fallon) told him right out of the gate that he was so happy to see longtime nemesis Jay Leno leave the job, he would have been just as happy to see Mahmoud Ahmadinejad or Charles Manson host "The Tonight Show." He also gave some tips to The Roots, questioned whether Jimmy is actually gay and told him that he likes Jimmy Kimmel more than him.

All in all, classic Stern. Check out the clip above to see him not hold anything back.

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