Miley Cyrus — a mean girl?

In a YouTube video (made a few months ago), Miley and her BFF Mandy mock Selena Gomez and her pal Demi Lovato.

Miley, 15, makes fun of a T-shirt Gomez, 16, wore and teases Demi, 15, about a gap she used to have in her teeth.

See photos of what teen stars looked like two years ago.

The clip surfaces the same week that sources tell Usmagazine.com that Selena is dating Miley’s ex Nick Jonas (a rep for the Jonas Brothers insists they’re just friends).

Following Miley’s controversial Vanity Fair cover, some pegged Gomez and Lovato as two wholesome girls who could fill the teen queen’s shoes.

But the Hannah Montana star recently told Extra, “I don’t think there could be a next Miley. I think they should be the next Selena, the next Demi … [and] make their own way.”

[Credit: Us Weekly]