There's no denying that Demi Lovato can sing. (I mean, did you hear the girl at the Grammys last weekend?) But did you know that Demi can sing like Christina Aguilera? Cher? Fetty Wap? (Well, that last one would be rap, actually.)

On Friday night the "Cool For The Summer" songstress appeared on The Tonight Show Starring Jimmy Fallon, where she participated in a game of "Musical Impressions" alongside the funny talk-show host. Going up against Jimmy when it comes to celebrity impressions can be intimidating (after all, the man literally made a name for himself with a Saturday Night Live audition featuring his iconic impressions of famous folks). Luckily, Demi more than held her own—in fact, she swept floor with him!

First, the former Disney darling showed off her impersonation of the "Believe" diva herself, Cher, warbling along to "Bingo Was His Name-O." She followed it up with a surprisingly spot-on imitation of Fetty Wap, ingeniously sing-rapping the lyrics to "Twinkle Twinkle Little Star" to the tune of "My Way." But it was her rendition of the SpongeBob Squarepants theme, sung in Christina Aguilera's iconic belting voice—dramatic ad libs and all—that stole the show, resulting in a standing ovation from the host himself as well as thunderous applause from the audience.

To be fair, Jimmy's Louis Armstrong/"Mr. Rogers' Neighborhood" was good (real good even!), but it just couldn't compete with that Aguilera impression—or Demi's powerhouse vocals. But that's what happens when pop stars play "Diirty."

Check out the sexiest celeb selfies of 2014:

More From AM 1490 WDBQ