There's an Episode of My Little Pony Aired Yesterday Called: Filli Vanilli with Applejack Saying this Line:

Big Mac, you got some 'splainin' to do!

Okay... If I'm Not Mistaken, There's a Cartoon that Refernce that Line called "The Fairly Oddparents" in a Episode; Power Mad..."Wanda! you got some 'splainin' to do!Which is to Pay Tribute to the Classic Show, I Love Lucy, it was a line attributed to, but never actually said by, Ricky Ricardo from the same show.
There's another line from the same episode:

For corn's sake, let's go!

it was a line originally written for Fall Weather Friends, is a reference to the character Fred Mertz from the 1951 sitcom I Love Lucy.

What is this? Referenception?