OK! Magazine reports that Jennifer Aniston and Angelina Jolie are on a collision course that's destined to lead to fireworks at the Night Before the Oscars party in Beverly Hills on February 21.

Relations have been chilly between Brad Pitt's ex-wife and his current love interest recently. After Jolie intimated that she and Pitt had hooked up while filming Mr. & Mrs. Smith in 2005—a period of time that overlapped with Pitt's marriage to Aniston—Jen fired back in a December Vogue interview that Angelina had been "very uncool" about the whole thing.

Well, things are about to heat up plenty, according to an insider.

"[Aniston] has always known this moment would happen, and she's never been more ready to see her nemesis, Angie, in the flesh," a source reveals to the magazine. "She's no longer alone—she has a hot man in her life, John Mayer, and she plans to bring him as her date to the party."

And perhaps as her backup if things get violent?

Stay tuned; this could get interesting...