FIGHT!

There's a battle brewing between 2 pop sensations. Miley Cyrus Vs. Katy Perry! Here's what went down.

Katy Perry (jokingly) suggested to an interviewer that she would be reinacting the famous Madonna/Britney kiss during her performance at the MTV Music Video awards - with Miley kissing her.

Well Miley didn't find the humor. She responded with: "Uhm no thanks! She sang on my record, you know only doing harmonies and backgrounds. Not its like she's trying to get back at me."

Well Katy took it to another level by responding, via perezhilton, with: "6 weeks at number 1 Miley. 6 weeks." BAM! That of course is talking about her rocking single "I Kissed a Girl" which has sat at the top of billboards song charts. Miley's newest single debuted low and is dropping off slowly.

However if you wanna play it fair, Miley's album was released last week and sits atop the charts at the number 1 spot - and its the highest debuting album of the year for a female artist. Ouch.