Regulators Bert And Ernie Mount Up As Warren G And Nate Dogg

We can't believe this happened in "Sesame Street ."

Bert and Ernie rap along to Warren G and Nate Dogg 's 1994 smash hit "Regulate" in this incredible mashup video.

It's the latest wonderful effort from Adam Schleichkorn, who transformed the cast of the educational kids' show into Bone Thugs-n-Harmony  for a performance of "Tha Crossroads" this earlier month.

This time the fictional street's two best friends take center stage.

"This song honestly ended up being just [as] tough as my last one (Crossroads), if not tougher," he wrote on his YouTube channel "isthishowyougoviral " on Monday.

Schleichkorn revealed he "almost bailed on it several times." But he said the song was the most requested in the comments section, "so I felt as if I had to give the people what they wanted." See how it compares to the original:

Schleichkorn's channel has gotten more than 7.6 million views since he launched it in 2012. His Bone Thugs-n-Harmony mashup has garnered 1.7 million hits alone:

He's also helped "The Muppets " perform the Beastie Boys' classic  "So What'cha Want ."

And he had Barney the Dinosaur rapping along to "Get Money" by Junior Mafia featuring Notorious B.I.G.