jessejameskatdunzo.jpgJust a little over a month after gushing to reporters that Jesse James was "the one," Kat Von D has apparently dumped him and already gotten back together with ex-boyfriend Nikki Sixx.

“Kat used Jesse to win Nikki back, and it worked,” a friend of Kat's tells Life & Style. “She also was using Jesse for the press," the "pal" said of the tv star, who's also got a new book to promote.

But we can't help thinking that this is just a case of trying to appear like she's the dumper when really she was the dumpee!

"Jesse and Kat are definitely over. Done,” a source close to Jesse says. “He’s in Austin [where ex-wife Sandra Bullock lives], she’s in LA.”